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1
Babicheva, Viktoriia E. "Optical Processes behind Plasmonic Applications". Nanomaterials 13, nr 7 (3.04.2023): 1270. http://dx.doi.org/10.3390/nano13071270.
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Plasmonics is a revolutionary concept in nanophotonics that combines the properties of both photonics and electronics by confining light energy to a nanometer-scale oscillating field of free electrons, known as a surface plasmon. Generation, processing, routing, and amplification of optical signals at the nanoscale hold promise for optical communications, biophotonics, sensing, chemistry, and medical applications. Surface plasmons manifest themselves as confined oscillations, allowing for optical nanoantennas, ultra-compact optical detectors, state-of-the-art sensors, data storage, and energy harvesting designs. Surface plasmons facilitate both resonant characteristics of nanostructures and guiding and controlling light at the nanoscale. Plasmonics and metamaterials enable the advancement of many photonic designs with unparalleled capabilities, including subwavelength waveguides, optical nanoresonators, super- and hyper-lenses, and light concentrators. Alternative plasmonic materials have been developed to be incorporated in the nanostructures for low losses and controlled optical characteristics along with semiconductor-process compatibility. This review describes optical processes behind a range of plasmonic applications. It pays special attention to the topics of field enhancement and collective effects in nanostructures. The advances in these research topics are expected to transform the domain of nanoscale photonics, optical metamaterials, and their various applications.
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Davis, Timothy J., Daniel E. Gómez i Ann Roberts. "Plasmonic circuits for manipulating optical information". Nanophotonics 6, nr 3 (26.10.2016): 543–59. http://dx.doi.org/10.1515/nanoph-2016-0131.
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AbstractSurface plasmons excited by light in metal structures provide a means for manipulating optical energy at the nanoscale. Plasmons are associated with the collective oscillations of conduction electrons in metals and play a role intermediate between photonics and electronics. As such, plasmonic devices have been created that mimic photonic waveguides as well as electrical circuits operating at optical frequencies. We review the plasmon technologies and circuits proposed, modeled, and demonstrated over the past decade that have potential applications in optical computing and optical information processing.
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Song, Justin C. W., i Mark S. Rudner. "Chiral plasmons without magnetic field". Proceedings of the National Academy of Sciences 113, nr 17 (11.04.2016): 4658–63. http://dx.doi.org/10.1073/pnas.1519086113.
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Plasmons, the collective oscillations of interacting electrons, possess emergent properties that dramatically alter the optical response of metals. We predict the existence of a new class of plasmons—chiral Berry plasmons (CBPs)—for a wide range of 2D metallic systems including gapped Dirac materials. As we show, in these materials the interplay between Berry curvature and electron–electron interactions yields chiral plasmonic modes at zero magnetic field. The CBP modes are confined to system boundaries, even in the absence of topological edge states, with chirality manifested in split energy dispersions for oppositely directed plasmon waves. We unveil a rich CBP phenomenology and propose setups for realizing them, including in anomalous Hall metals and optically pumped 2D Dirac materials. Realization of CBPs will offer a powerful paradigm for magnetic field-free, subwavelength optical nonreciprocity, in the mid-IR to terahertz range, with tunable splittings as large as tens of THz, as well as sensitive all-optical diagnostics of topological bands.
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Wang, Jingyu, Min Gao, Yonglin He i Zhilin Yang. "Ultrasensitive and ultrafast nonlinear optical characterization of surface plasmons". APL Materials 10, nr 3 (1.03.2022): 030701. http://dx.doi.org/10.1063/5.0083239.
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Amid the rapid development of nanosciences and nanotechnologies, plasmonics has emerged as an essential and fascinating discipline. Surface plasmons (SPs) lay solid physical foundations for plasmonics and have been broadly applied to ultrahigh-resolution spectroscopy, optical modulation, renewable energy, communication technology, etc. Sensitive optical characterizations for SPs, including far/near-field optics, spatial-resolved spectroscopy, and time-resolved behaviors of SPs, have prompted intense interest in diverse fields. In this Research Update, the ultrasensitive optical characterization for sub-radiant SPs is first introduced. Then, distinct characterization methods of nonlinear plasmonics, including plasmon-enhanced second harmonic generation and plasmon-enhanced sum frequency generation, are demonstrated in some classical nanostructures. Transient optical characterizations of SPs are also demonstrated in some well-defined nanostructures, enabling the deep realization of time-resolved behaviors. Finally, future prospects and efforts of optical characterization for SPs are proposed.
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Морозов, М. Ю., И. М. Моисеенко, А. В. Коротченков i В. В. Попов. "Замедление терагерцовых плазменных волн в конической структуре с графеном, накачиваемым с помощью оптических плазменных волн". Физика и техника полупроводников 55, nr 6 (2021): 518. http://dx.doi.org/10.21883/ftp.2021.06.50920.9525.
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Deceleration of terahertz (THz) plasma waves (plasmons) in tapered structure with graphene layer pumped by optical plasmons is studied theoretically. It is shown, that THz plasma wave is decelerated when moving toward the structure apex. Deceleration of THz plasmons in tapered structure with graphene layer pumped by optical plasmons is more efficient as compared to deceleration of THz plasmons in tapered structure with graphene screened by metal without pumping by optical plasmons for the same parameter values of the structure. The plasmon phase velocity near the taper apex can become an order of magnitude smaller as compared to that value in the input of the structure for achievable power densities of the optical plasmon.
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Balevičius, Zigmas. "Strong Coupling between Tamm and Surface Plasmons for Advanced Optical Bio-Sensing". Coatings 10, nr 12 (5.12.2020): 1187. http://dx.doi.org/10.3390/coatings10121187.
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The total internal reflection ellipsometry method was used to analyse the angular spectra of the hybrid Tamm and surface plasmon modes and to compare their results with those obtained using the conventional single SPR method. As such type of measurement is quite common in commercial SPR devices, more detailed attention was paid to the analysis of the p-polarization reflection intensity dependence. The conducted study showed that the presence of strong coupling in the hybrid plasmonic modes increases the sensitivity of the plasmonic-based sensors due to the reduced losses in the metal layer. The experimental results and analysis of the optical responses of three different plasmonic-based samples indicated that the optimized Tamm plasmons ΔRp(TP) and optimized surface plasmons ΔRp(SP) samples produce a response that is about five and six times greater than the conventional surface plasmon resonance ΔRp(SPR) in angular spectra. The sensitivity of the refractive index unit of the spectroscopic measurements for the optimized Tamm plasmon samples was 1.5 times higher than for conventional SPR, while for wavelength scanning, the SPR overcame the optimized TP by 1.5 times.
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Umakoshi, Takayuki, Misaki Tanaka, Yuika Saito i Prabhat Verma. "White nanolight source for optical nanoimaging". Science Advances 6, nr 23 (czerwiec 2020): eaba4179. http://dx.doi.org/10.1126/sciadv.aba4179.
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Nanolight sources, which are based on resonant excitation of plasmons near a sharp metallic nanostructure, have attracted tremendous interest in the vast research fields of optical nanoimaging. However, being a resonant phenomenon, this ideally works only for one wavelength that resonates with the plasmons. Multiple wavelengths of light in a broad range confined to one spot within a nanometric volume would be an interesting form of light, useful in numerous applications. Plasmon nanofocusing can generate a nanolight source through the propagation and adiabatic compressions of plasmons on a tapered metallic nanostructure, which is independent of wavelength, as it is based on the propagation, rather than resonance, of plasmons. Here, we report the generation of a white nanolight source spanning over the entire visible range through plasmon nanofocusing and demonstrate spectral bandgap nanoimaging of carbon nanotubes. Our experimental demonstration of the white nanolight source would stimulate diverse research fields toward next-generation nanophotonic technologies.
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Ye, Fan, Juan M. Merlo, Michael J. Burns i Michael J. Naughton. "Optical and electrical mappings of surface plasmon cavity modes". Nanophotonics 3, nr 1-2 (1.04.2014): 33–49. http://dx.doi.org/10.1515/nanoph-2013-0038.
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AbstractPlasmonics is a rapidly expanding field, founded in physics but now with a growing number of applications in biology (biosensing), nanophotonics, photovoltaics, optical engineering and advanced information technology. Appearing as charge density oscillations along a metal surface, excited by electromagnetic radiation (e.g., light), plasmons can propagate as surface plasmon polaritons, or can be confined as standing waves along an appropriately-prepared surface. Here, we review the latter manifestation, both their origins and the manners in which they are detected, the latter dominated by near field scanning optical microscopy (NSOM/SNOM). We include discussion of the “plasmonic halo” effect recently observed by the authors, wherein cavity-confined plasmons are able to modulate optical transmission through step-gap nanostructures, yielding a novel form of color (wavelength) selection.
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Moskovits, Martin. "Canada’s early contributions to plasmonics". Canadian Journal of Chemistry 97, nr 6 (czerwiec 2019): 483–87. http://dx.doi.org/10.1139/cjc-2018-0365.
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The field of plasmonics — the study of collective electron excitation in nanostructured metal and other conductors — is currently highly active with research foci in a number of related fields, including plasmon-enhanced spectroscopies and plasmon-mediated photochemical and photocatalytic processes through which the energy stored temporarily as plasmons can be used to enable and (or) accelerate photochemistry. This enhancement is accomplished either by the action of the large optical fields produced in the vicinity of plasmonic nanostructures or mediated by the energetic electrons and holes surviving transiently following the dephasing of the plasmon. This article traces the early contributions to the foundation of the current field of plasmonics by two scientists working in Canada in the early 1970s, J. P. Marton at McMaster University and Welwyn Corporation and the current author while he was at the University of Toronto.
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Kawata, Satoshi. "Plasmonics for Nanoimaging and Nanospectroscopy". Applied Spectroscopy 67, nr 2 (luty 2013): 117–25. http://dx.doi.org/10.1366/12-06861.
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The science of surface plasmon polaritons, known as “plasmonics,” is reviewed from the viewpoint of applied spectroscopy. In this discussion, noble metals are regarded as reservoirs of photons exhibiting the functions of photon confinement and field enhancement at metallic nanostructures. The functions of surface plasmons are described in detail with an historical overview, and the applications of plasmonics to a variety of industry and sciences are shown. The slow light effect of surface plasmons is also discussed for nanoimaging capability of the near-field optical microscopy and tip-enhanced Raman microscopy. The future issues of plasmonics are also shown, including metamaterials and the extension to the ultraviolet and terahertz regions.
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Kvítek, Ondřej, Jakub Siegel, Vladimír Hnatowicz i Václav Švorčík. "Noble Metal Nanostructures Influence of Structure and Environment on Their Optical Properties". Journal of Nanomaterials 2013 (2013): 1–15. http://dx.doi.org/10.1155/2013/743684.
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Optical properties of nanostructured materials, isolated nanoparticles, and structures composed of both metals and semiconductors are broadly discussed. Fundamentals of the origin of surface plasmons as well as the surface plasmon resonance sensing are described and documented on a number of examples. Localized plasmon sensing and surface-enhanced Raman spectroscopy are subjected to special interest since those techniques are inherently associated with the direct application of plasmonic structures. The possibility of tailoring the optical properties of ultra-thin metal layers via controlling their shape and morphology by postdeposition annealing is documented. Special attention is paid to the contribution of bimetallic particles and layers as well as metal structures encapsulated in semiconductors and dielectrics to the optical response. The opportunity to tune the properties of materials over a large scale of values opens up entirely new application possibilities of optical active structures. The nature of surface plasmons predetermines noble metal nanostructures to be promising great materials for development of modern label-free sensing methods based on plasmon resonance—SPR and LSPR sensing.
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Song, Wen-Bo, Yun Qi, Xiao-Peng Zhang, Ming-Li Wan i Jinna He. "Controlling the interference between localized and delocalized surface plasmons via incident polarization for optical switching". International Journal of Modern Physics B 32, nr 16 (28.06.2018): 1850194. http://dx.doi.org/10.1142/s0217979218501941.
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Surface plasmons supported by various metallic nanostructures have given rise to several significant breakthroughs in the field of integrated photonic devices due to its ability to effectively confine and enhance optical field in subwavelength volume. In particular, the demand to actively control optical responses of plasmonic systems becomes urgent for the miniaturization of signal processing devices, surface-enhanced Raman scattering (SERS) substrates and biochemical sensors. In this paper, we systematically investigate the plasmon modes as well as their interaction in a layered nanostructure composed of a periodically-arranged radiative nanoring and a metallic ground plane, as well as a thin insulating spacer. A tunable transparent peak on the background of the broadband plasmon resonance emerges in the reflection spectrum as changing the periodicity of nanoparticle array, a plasmonic analogue of electromagnetically induced transparency (EIT). Owing to the structural symmetry of the rings, we demonstrate a new scheme of controlling the interference between localized and delocalized plasmons by means of incident polarization and believe that the proposed metasurface may find applications in optical switching if the polarization-controlled components are introduced.
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Yi, Ruizhi, Wenwen Wu i Xinping Zhang. "Femtosecond Autocorrelation of Localized Surface Plasmons". Nanomaterials 13, nr 9 (28.04.2023): 1513. http://dx.doi.org/10.3390/nano13091513.
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Plasmon electronic dephasing lifetime is one of the most important characteristics of localized surface plasmons, which is crucial both for understanding the related photophysics and for their applications in photonic and optoelectronic devices. This lifetime is generally shorter than 100 fs and measured using the femtosecond pump–probe technique, which requires femtosecond laser amplifiers delivering pulses with a duration even as short as 10 fs. This implies a large-scale laser system with complicated pulse compression schemes, introducing high-cost and technological challenges. Meanwhile, the strong optical pulse from an amplifier induces more thermal-related effects, disturbing the precise resolution of the pure electronic dephasing lifetime. In this work, we use a simple autocorrelator design and integrate it with the sample of plasmonic nanostructures, where a femtosecond laser oscillator supplies the incident pulses for autocorrelation measurements. Thus, the measured autocorrelation trace carries the optical modulation on the incident pulses. The dephasing lifetime can be thus determined by a comparison between the theoretical fittings to the autocorrelation traces with and without the plasmonic modulation. The measured timescale for the autocorrelation modulation is an indirect determination of the plasmonic dephasing lifetime. This supplies a simple, rapid, and low-cost method for quantitative characterization of the ultrafast optical response of localized surface plasmons.
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ZHOU, XIN, HONGJIAN LI, SHAOLI FU, SUXIA XIE, HAIQING XU i JINJUN WU. "OPTICAL PROPERTIES AND PLASMON RESONANCE OF COUPLED GOLD NANOSHELL ARRAYS". Modern Physics Letters B 25, nr 02 (20.01.2011): 109–18. http://dx.doi.org/10.1142/s0217984911025523.
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The optical properties and plasmon resonances coupling of ordered gold nanoshell arrays are investigated theoretically by means of finite-difference time-domain (FDTD) theory. We showed that the thickness, size and inter-shell distance of the nanoshells can tune the optical transmission of the system and the highly geometry-dependent plasmon response can be seen as an interaction between the essentially fixed-frequency plasmon response of a nanosphere and that of a nanocavity for the nanoshells. We also revealed the two different resonance modes by analyzing the spatial distributions of electric field component Ez. We proposed that the peaks of the lower energy mainly originate from the sphere plasmons coupling and the peaks of the higher energy are mainly attributed to the coupling between the sphere plasmons and the cavity plasmons.
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Ogawa, Shinpei, Shoichiro Fukushima i Masaaki Shimatani. "Graphene Plasmonics in Sensor Applications: A Review". Sensors 20, nr 12 (23.06.2020): 3563. http://dx.doi.org/10.3390/s20123563.
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Surface plasmon polaritons (SPPs) can be generated in graphene at frequencies in the mid-infrared to terahertz range, which is not possible using conventional plasmonic materials such as noble metals. Moreover, the lifetime and confinement volume of such SPPs are much longer and smaller, respectively, than those in metals. For these reasons, graphene plasmonics has potential applications in novel plasmonic sensors and various concepts have been proposed. This review paper examines the potential of such graphene plasmonics with regard to the development of novel high-performance sensors. The theoretical background is summarized and the intrinsic nature of graphene plasmons, interactions between graphene and SPPs induced by metallic nanostructures and the electrical control of SPPs by adjusting the Fermi level of graphene are discussed. Subsequently, the development of optical sensors, biological sensors and important components such as absorbers/emitters and reconfigurable optical mirrors for use in new sensor systems are reviewed. Finally, future challenges related to the fabrication of graphene-based devices as well as various advanced optical devices incorporating other two-dimensional materials are examined. This review is intended to assist researchers in both industry and academia in the design and development of novel sensors based on graphene plasmonics.
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You, Chenglong, Apurv Chaitanya Nellikka, Israel De Leon i Omar S. Magaña-Loaiza. "Multiparticle quantum plasmonics". Nanophotonics 9, nr 6 (17.04.2020): 1243–69. http://dx.doi.org/10.1515/nanoph-2019-0517.
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AbstractA single photon can be coupled to collective charge oscillations at the interfaces between metals and dielectrics forming a single surface plasmon. The electromagnetic near-fields induced by single surface plasmons offer new degrees of freedom to perform an exquisite control of complex quantum dynamics. Remarkably, the control of quantum systems represents one of the most significant challenges in the field of quantum photonics. Recently, there has been an enormous interest in using plasmonic systems to control multiphoton dynamics in complex photonic circuits. In this review, we discuss recent advances that unveil novel routes to control multiparticle quantum systems composed of multiple photons and plasmons. We describe important properties that characterize optical multiparticle systems such as their statistical quantum fluctuations and correlations. In this regard, we discuss the role that photon-plasmon interactions play in the manipulation of these fundamental properties for multiparticle systems. We also review recent works that show novel platforms to manipulate many-body light-matter interactions. In this spirit, the foundations that will allow nonexperts to understand new perspectives in multiparticle quantum plasmonics are described. First, we discuss the quantum statistical fluctuations of the electromagnetic field as well as the fundamentals of plasmonics and its quantum properties. This discussion is followed by a brief treatment of the dynamics that characterize complex multiparticle interactions. We apply these ideas to describe quantum interactions in photonic-plasmonic multiparticle quantum systems. We summarize the state-of-the-art in quantum devices that rely on plasmonic interactions. The review is concluded with our perspective on the future applications and challenges in this burgeoning field.
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Li, Shaobo, Shuming Yang, Fei Wang, Qiang Liu, Biyao Cheng i Yossi Rosenwaks. "Plasmonic interference modulation for broadband nanofocusing". Nanophotonics 10, nr 16 (26.10.2021): 4113–23. http://dx.doi.org/10.1515/nanoph-2021-0405.
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Abstract Metallic plasmonic probes have been successfully applied in near-field imaging, nanolithography, and Raman enhanced spectroscopy because of their ability to squeeze light into nanoscale and provide significant electric field enhancement. Most of these probes rely on nanometric alignment of incident beam and resonant structures with limited spectral bandwidth. This paper proposes and experimentally demonstrates an asymmetric fiber tip for broadband interference nanofocusing within its full optical wavelengths (500–800 nm) at the nanotip with 10 nm apex. The asymmetric geometry consisting of two semicircular slits rotates plasmonic polarization and converts the linearly polarized plasmonic mode to the radially polarized plasmonic mode when the linearly polarized beam couples to the optical fiber. The three-dimensional plasmonic modulation induces circumference interference and nanofocus of surface plasmons, which is significantly different from the nanofocusing through plasmon propagation and plasmon evolution. The plasmonic interference modulation provides fundamental insights into the plasmon engineering and has important applications in plasmon nanophotonic technologies.
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Dong, Jun, Zhenglong Zhang, Hairong Zheng i Mentao Sun. "Recent Progress on Plasmon-Enhanced Fluorescence". Nanophotonics 4, nr 4 (30.12.2015): 472–90. http://dx.doi.org/10.1515/nanoph-2015-0028.
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AbstractThe optically generated collective electron density waves on metal–dielectric boundaries known as surface plasmons have been of great scientific interest since their discovery. Being electromagnetic waves on gold or silver nanoparticle’s surface, localised surface plasmons (LSP) can strongly enhance the electromagnetic field. These strong electromagnetic fields near the metal surfaces have been used in various applications like surface enhanced spectroscopy (SES), plasmonic lithography, plasmonic trapping of particles, and plasmonic catalysis. Resonant coupling of LSPs to fluorophore can strongly enhance the emission intensity, the angular distribution, and the polarisation of the emitted radiation and even the speed of radiative decay, which is so-called plasmon enhanced fluorescence (PEF). As a result, more and more reports on surface-enhanced fluorescence have appeared, such as SPASER-s, plasmon assisted lasing, single molecule fluorescence measurements, surface plasmoncoupled emission (SPCE) in biological sensing, optical orbit designs etc. In this review, we focus on recent advanced reports on plasmon-enhanced fluorescence (PEF). First, the mechanism of PEF and early results of enhanced fluorescence observed by metal nanostructure will be introduced. Then, the enhanced substrates, including periodical and nonperiodical nanostructure, will be discussed and the most important factor of the spacer between molecule and surface and wavelength dependence on PEF is demonstrated. Finally, the recent progress of tipenhanced fluorescence and PEF from the rare-earth doped up-conversion (UC) and down-conversion (DC) nanoparticles (NPs) are also commented upon. This review provides an introduction to fundamentals of PEF, illustrates the current progress in the design of metallic nanostructures for efficient fluorescence signal amplification that utilises propagating and localised surface plasmons.
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Marinica, Dana Codruta, Mario Zapata, Peter Nordlander, Andrey K. Kazansky, Pedro M. Echenique, Javier Aizpurua i Andrei G. Borisov. "Active quantum plasmonics". Science Advances 1, nr 11 (grudzień 2015): e1501095. http://dx.doi.org/10.1126/sciadv.1501095.
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The ability of localized surface plasmons to squeeze light and engineer nanoscale electromagnetic fields through electron-photon coupling at dimensions below the wavelength has turned plasmonics into a driving tool in a variety of technological applications, targeting novel and more efficient optoelectronic processes. In this context, the development of active control of plasmon excitations is a major fundamental and practical challenge. We propose a mechanism for fast and active control of the optical response of metallic nanostructures based on exploiting quantum effects in subnanometric plasmonic gaps. By applying an external dc bias across a narrow gap, a substantial change in the tunneling conductance across the junction can be induced at optical frequencies, which modifies the plasmonic resonances of the system in a reversible manner. We demonstrate the feasibility of the concept using time-dependent density functional theory calculations. Thus, along with two-dimensional structures, metal nanoparticle plasmonics can benefit from the reversibility, fast response time, and versatility of an active control strategy based on applied bias. The proposed electrical manipulation of light using quantum plasmonics establishes a new platform for many practical applications in optoelectronics.
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Coello, Víctor, Cesar E. Garcia-Ortiz i Manuel Garcia-Mendez. "Classical Plasmonics: Wave Propagation Control at Subwavelength Scale". Nano 10, nr 07 (październik 2015): 1530005. http://dx.doi.org/10.1142/s1793292015300054.
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In this paper, surface plasmons polariton propagation and manipulation is reviewed in the context of experiments and modeling of optical images. We focus our attention in the interaction of surface plasmon polaritons with arrays of micro-scatereres and nanofabricated structures. Numerical simulations and experimental results of different plasmonic devices are presented. Plasmonic beam manipulation opens up numerous possibilities for application in biosensing, nanophotonics, and in general in the area of surface optics properties.
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Томилина, О. А., В. Н. Бержанский i С. В. Томилин. "Влияние перколяционного перехода на электропроводящие и оптические свойства сверхтонких металлических пленок". Физика твердого тела 62, nr 4 (2020): 614. http://dx.doi.org/10.21883/ftt.2020.04.49129.610.
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In paper the investigation results of features of electrophysical, optical and plasmonic properties changes in ultrathin metallic films during percolation transition from island structure to continuous are representative. It was shown that during Ti and Pt thin films condensation a change of their electrical conductivity above the percolation threshold is well described in the framework of the classical percolation theory. The resonance behavior of localized plasmons and surface (propagating) plasmon-polaritons in Au metal films during a percolation transition was studied. It was shown that when the film becomes to a granular state a decrease in the Q-factor of surface plasmon-polariton resonance is observed in the vicinity of the percolation transition, which is associated with excitation of localized plasmons in metallic nanoparticles. For all studied coatings the percolation threshold was determined.
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Hudedmani, Mallikarjun G., i Bindu Suresh Pagad. "Plasmonics: A Path to Replace Electronics and Photonics by Scalable Ultra-fast Technology". Advanced Journal of Graduate Research 7, nr 1 (27.10.2019): 37–44. http://dx.doi.org/10.21467/ajgr.7.1.37-44.
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Semiconductor devices, circuits, and components are dependent upon miniaturization for transporting huge amounts of data at a high speed these provide the ability to control the transport and storage of electrons. Current communication systems are based on either electrons or photonics. These modern electronic devices for information processing and sensing are functioning almost close to their fundamental speed and bandwidth limitations which a serious problem. The performance of electronic circuits, as well as photonics, is now becoming rather limited when digital information needs to be sent from one point to another. Plasmonics is a new technology a kind of photonics-based on surface plasmons viable. Surface plasmons are a way of guiding light. Surface Plasmon (SP) based circuits, which merge electronics and photonics at the nanoscale, may offer a solution to the size-compatibility problem. Optical fiber communication (OFC) is a well-known light enabled information transmission mechanism communicates very effectively over large distance. Surface plasmons, on the other hand, can guide light only over distances of tens or hundreds of microns. Surface plasmons are the electromagnetic (optical) waves get generated from the interaction between light and the mobile conduction electrons on the surface of a metal. The surface plasmons created by the interaction of light near the surface possess unique advantages like the high speed of communication which is very essential for the current generation of electrical and medical fields.
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Zhang, Xiaoyu, Chanda Ranjit Yonzon i Richard P. Van Duyne. "Nanosphere lithography fabricated plasmonic materials and their applications". Journal of Materials Research 21, nr 5 (1.05.2006): 1083–92. http://dx.doi.org/10.1557/jmr.2006.0136.
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Nanosphere lithography fabricated nanostructures have highly tunable localized surface plasmons, which have been used for important sensing and spectroscopy applications. In this work, the authors focus on biological applications and technologies that utilize two types of related plasmonic phenomena: localized surface plasmon resonance (LSPR) spectroscopy and surface-enhanced Raman spectroscopy (SERS). Two applications of these plasmonic materials are presented: (i) the development of an ultrasensitive nanoscale optical biosensor based on LSPR wavelength-shift spectroscopy and (ii) the SERS detection of an anthrax biomarker.
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Xia, Younan, i Naomi J. Halas. "Shape-Controlled Synthesis and Surface Plasmonic Properties of Metallic Nanostructures". MRS Bulletin 30, nr 5 (maj 2005): 338–48. http://dx.doi.org/10.1557/mrs2005.96.
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AbstractThe interaction of light with free electrons in a gold or silver nanostructure can give rise to collective excitations commonly known as surface plasmons. Plasmons provide a powerful means of confining light to metal/dielectric interfaces, which in turn can generate intense local electromagnetic fields and significantly amplify the signal derived from analytical techniques that rely on light, such as Raman scattering. With plasmons, photonic signals can be manipulated on the nanoscale, enabling integration with electronics (which is now moving into the nano regime). However, to benefit from their interesting plasmonic properties, metal structures of controlled shape (and size) must be fabricated on the nanoscale. This issue of MRS Bulletin examines how gold and silver nanostructures can be prepared with controllable shapes to tailor their surface plasmon resonances and highlights some of the unique applications that result, including enhancement of electromagnetic fields, optical imaging, light transmission, colorimetric sensing, and nanoscale waveguiding.
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Yan, Siqi, Xiaolong Zhu, Jianji Dong, Yunhong Ding i Sanshui Xiao. "2D materials integrated with metallic nanostructures: fundamentals and optoelectronic applications". Nanophotonics 9, nr 7 (17.04.2020): 1877–900. http://dx.doi.org/10.1515/nanoph-2020-0074.
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AbstractDue to their novel electronic and optical properties, atomically thin layered two-dimensional (2D) materials are becoming promising to realize novel functional optoelectronic devices including photodetectors, modulators, and lasers. However, light–matter interactions in 2D materials are often weak because of the atomic-scale thickness, thus limiting the performances of these devices. Metallic nanostructures supporting surface plasmon polaritons show strong ability to concentrate light within subwavelength region, opening thereby new avenues for strengthening the light–matter interactions and miniaturizing the devices. This review starts to present how to use metallic nanostructures to enhance light–matter interactions in 2D materials, mainly focusing on photoluminescence, Raman scattering, and nonlinearities of 2D materials. In addition, an overview of ultraconfined acoustic-like plasmons in hybrid graphene–metal structures is given, discussing the nonlocal response and quantum mechanical features of the graphene plasmons and metals. Then, the review summarizes the latest development of 2D material–based optoelectronic devices integrated with plasmonic nanostructures. Both off-chip and on-chip devices including modulators and photodetectors are discussed. The potentials of hybrid 2D materials plasmonic optoelectronic devices are finally summarized, giving the future research directions for applications in optical interconnects and optical communications.
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Ali, Adnan, Fedwa El-Mellouhi, Anirban Mitra i Brahim Aïssa. "Research Progress of Plasmonic Nanostructure-Enhanced Photovoltaic Solar Cells". Nanomaterials 12, nr 5 (25.02.2022): 788. http://dx.doi.org/10.3390/nano12050788.
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Enhancement of the electromagnetic properties of metallic nanostructures constitute an extensive research field related to plasmonics. The latter term is derived from plasmons, which are quanta corresponding to longitudinal waves that are propagating in matter by the collective motion of electrons. Plasmonics are increasingly finding wide application in sensing, microscopy, optical communications, biophotonics, and light trapping enhancement for solar energy conversion. Although the plasmonics field has relatively a short history of development, it has led to substantial advancement in enhancing the absorption of the solar spectrum and charge carrier separation efficiency. Recently, huge developments have been made in understanding the basic parameters and mechanisms governing the application of plasmonics, including the effects of nanoparticles’ size, arrangement, and geometry and how all these factors impact the dielectric field in the surrounding medium of the plasmons. This review article emphasizes recent developments, fundamentals, and fabrication techniques for plasmonic nanostructures while investigating their thermal effects and detailing light-trapping enhancement mechanisms. The mismatch effect of the front and back light grating for optimum light trapping is also discussed. Different arrangements of plasmonic nanostructures in photovoltaics for efficiency enhancement, plasmonics’ limitations, and modeling performance are also deeply explored.
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COELLO, VICTOR. "SURFACE PLASMON POLARITON LOCALIZATION". Surface Review and Letters 15, nr 06 (grudzień 2008): 867–79. http://dx.doi.org/10.1142/s0218625x08011974.
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Localization of surface plasmons polariton is reviewed in the context of experiments and modeling of near-field optical images. Near-field imaging of elastic (in-plane) surface plasmon scattering is discussed, and approaches for the correct image interpretation are outlined. Nonlinear effects related to localized surface plasmons are pressented. Surface plasmon localization opens up numerous possibilities for application in biosensing, nanophotonics, and in general in the area of surface optics properties.
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Wu, Yuyang, Peng Xie, Qi Ding, Yuhang Li, Ling Yue, Hong Zhang i Wei Wang. "Magnetic plasmons in plasmonic nanostructures: An overview". Journal of Applied Physics 133, nr 3 (21.01.2023): 030902. http://dx.doi.org/10.1063/5.0131903.
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The magnetic response of most natural materials, characterized by magnetic permeability, is generally weak. Particularly, in the optical range, the weakness of magnetic effects is directly related to the asymmetry between electric and magnetic charges. Harnessing artificial magnetism started with a pursuit of metamaterial design exhibiting magnetic properties. The first demonstration of artificial magnetism was given by a plasmonic nanostructure called split-ring resonators. Engineered circulating currents form magnetic plasmons, acting as the source of artificial magnetism in response to external electromagnetic excitation. In the past two decades, magnetic plasmons supported by plasmonic nanostructures have become an active topic of study. This Perspective reviews the latest studies on magnetic plasmons in plasmonic nanostructures. A comprehensive summary of various plasmonic nanostructures supporting magnetic plasmons, including split-ring resonators, metal–insulator–metal structures, metallic deep groove arrays, and plasmonic nanoclusters, is presented. Fundamental studies and applications based on magnetic plasmons are discussed. The formidable challenges and the prospects of the future study directions on developing magnetic plasmonic nanostructures are proposed.
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Cao, Yi, Jing Li, Mengtao Sun, Haiyan Liu i Lixin Xia. "Nonlinear Optical Microscopy and Plasmon Enhancement". Nanomaterials 12, nr 8 (8.04.2022): 1273. http://dx.doi.org/10.3390/nano12081273.
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Improving nonlinear optics efficiency is currently one of the hotspots in modern optical research. Moreover, with the maturity of nonlinear optical microscope systems, more and more biology, materials, medicine, and other related disciplines have higher imaging resolution and detection accuracy requirements for nonlinear optical microscope systems. Surface plasmons of metal nanoparticle structures could confine strong localized electromagnetic fields in their vicinity to generate a new electromagnetic mode, which has been widely used in surface-enhanced Raman scattering, surface-enhanced fluorescence, and photocatalysis. In this review, we summarize the mechanism of nonlinear optical effects and surface plasmons and also review some recent work on plasmon-enhanced nonlinear optical effects. In addition, we present some latest applications of nonlinear optical microscopy system research.
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Zimnyakova, Polina E., Daria O. Ignatyeva, Andrey N. Kalish, Xiufeng Han i Vladimir I. Belotelov. "Plasmonic dichroism and all-optical magnetization switching in nanophotonic structures with GdFeCo". Optics Letters 47, nr 23 (15.11.2022): 6049. http://dx.doi.org/10.1364/ol.472046.
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We report on a phenomenon of plasmonic dichroism observed in magnetic materials with transverse magnetization under excitation of surface plasmon polariton waves. The effect originates from the interplay of the two magnetization-dependent contributions to the material absorption, both of which are enhanced under plasmon excitation. Plasmonic dichroism is similar to circular magnetic dichroism, which is at the base of all-optical helicity-dependent switching (AO-HDS) but observed for linearly polarized light, and the dichroism acts upon in-plane magnetized films, where AO-HDS does not take place. We show by electromagnetic modeling that laser pulses exciting counter-propagating plasmons can be used to write +M or −M states in a deterministic way independent of the initial magnetization state. The presented approach applies to various ferrimagnetic materials with in-plane magnetization, exhibiting the phenomenon of all-optical switching of a thermal nature and broadens the horizons of their applications in data storage devices.
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Zhao, De Wen, Song Gang, Zhi Wei Wei i Li Yu. "Optical Interaction in a Plasmonic Metallic Nanoparticle Chain Coupled to a Metallic Film". Advanced Materials Research 534 (czerwiec 2012): 46–50. http://dx.doi.org/10.4028/www.scientific.net/amr.534.46.
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We demonstrated the coupling of localized surface plasmons and surface plasmon polaritons modes in a system composed of a metallic particle chain separated from a thin metallic film. The results showed that: (1) the thickness of the metallic particles buried in the dielectric space, (2) the positions of the particles influence the level of interaction between localized surface plasmons and surface plasmon polaritons modes. Meanwhile, the positions of the particles and the thickness of the metallic particles control the electromagnetic enhancement and influence the electric field distributions in this system. This kind of system has a very promising candidate for biosensing and surface enhanced spectroscopy applications.
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Кособукин, В. А. "Кулоновские плазмон-экситоны в планарных наноструктурах металл-полупроводник". Физика твердого тела 63, nr 4 (2021): 527. http://dx.doi.org/10.21883/ftt.2021.04.50720.248.
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A theory of Coulomb (non-radiative) plasmons-excitons in a semiconductor with adjacent quantum well and ultrathin metal film is presented. The equations of motion are formulated for the polarization waves of surface plasmons and quasi-two-dimensional excitons with taking account of Coulomb interaction between them. Within a model of coupled harmonic oscillators, solved are the problems of Coulomb plasmon, exciton and plasmon-exciton excitations in the presence of an external dipole force. The coupling contant is calculated for plasmon-excitons, their optical spectra are investigated, and the relative contributions of plasmons and excitons to the normal modes are found. It is concluded that near the resonance between plasmon and exciton the spectrum of plasmon-exciton excitations consists of two peaks whose behavior in passing through the resonance shows the signs of anti-crossing effect (repulsion of frequencies).
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Кособукин, В. А. "Кулоновские плазмон-экситоны в планарных наноструктурах металл-полупроводник". Физика твердого тела 63, nr 4 (2021): 527. http://dx.doi.org/10.21883/ftt.2021.04.50720.248.
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A theory of Coulomb (non-radiative) plasmons-excitons in a semiconductor with adjacent quantum well and ultrathin metal film is presented. The equations of motion are formulated for the polarization waves of surface plasmons and quasi-two-dimensional excitons with taking account of Coulomb interaction between them. Within a model of coupled harmonic oscillators, solved are the problems of Coulomb plasmon, exciton and plasmon-exciton excitations in the presence of an external dipole force. The coupling contant is calculated for plasmon-excitons, their optical spectra are investigated, and the relative contributions of plasmons and excitons to the normal modes are found. It is concluded that near the resonance between plasmon and exciton the spectrum of plasmon-exciton excitations consists of two peaks whose behavior in passing through the resonance shows the signs of anti-crossing effect (repulsion of frequencies).
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BLAIKIE, RICHARD J., MAAN M. ALKAISI, SHAREE J. McNAB i DAVID O. S. MELVILLE. "NANOSCALE OPTICAL PATTERNING USING EVANESCENT FIELDS AND SURFACE PLASMONS". International Journal of Nanoscience 03, nr 04n05 (sierpień 2004): 405–17. http://dx.doi.org/10.1142/s0219581x0400219x.
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Patterning with sub-diffraction-limited resolution has been demonstrated using a simple photolithography technique. Evanescent fields and surface plasmons are critical to the image formation, which is investigated here using computer simulations and experiments. A regime exists in which surface plasmons are resonantly excited, which we have named Evanescent Interferometric Lithography (EIL); period halving and reduced exposure times characterize this exposure mode. Two other exposure modes have been investigated in which surface plasmons on a planar metallic film beneath the mask are used to improve pattern formation. In the first, Planar Lens Lithography (PLL), a planar silver layer excited near its plasma frequency is used to form a projected near-field image. For a 40-nm thick silver layer, we predict that resolution down to 40 nm should be possible. However, the image is affected by the loss in the silver layer, the mask period, duty cycle and surrounding refractive index. Experimental verification of PLL is presented for 1-micron period structures imaged through 120 nm of silver. Finally, simulations are used to show that surface plasmons on an underlying silver layer can be used to improve process latitude and depth of field. We have named this mode Surface Plasmon Enhanced Contact Lithography (SPECL).
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Ohon, Natalia, Tetiana Bulavinets, Iryna Yaremchuk i Rostyslav Lesyuk. "Plasmon-Exciton Interaction in Perspective Hetero-Systems". East European Journal of Physics, nr 4 (6.12.2022): 6–22. http://dx.doi.org/10.26565/2312-4334-2022-4-01.
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Surface plasmons and excitons have been widely studied experimentally and theoretically for various material systems. However, a number of aspects require further deeper study and understanding, among which the connection of these quasi-particles occupies an important place. New physical effects arise when plasmons and excitons in nanostructures begin to be localized at certain small distances, as a result, we can talk about their coupling. Complex systems containing the excitation of plasmons and excitons, as well as their coupling, show interesting optical properties that they cannot exhibit individually. In this type of system, the plasmon enhances the coupling between the system and the external field, and the exciton controls certain spectral properties, which opens up new possibilities for tuning their optical response. The transferred energy between plasmons and excitons becomes an important factor affecting their interaction when the resonance frequency of the localized plasmon is very close to the molecular energy transition frequency. Two types of coupling can occur depending on the ratio between the strength of the coupling and the energy losses of individual components in the system, namely strong and weak. In addition to the mutual coupling between the plasmon and the exciton, their different linewidths and ability to couple to an external field provide a variety of means to tune the optical properties of hybrid systems. Thus, it enables precise control of light at the nanometer scale, opening up possibilities for new electronics and photonics applications. In this review, we highlight the features of weak and strong modes of plasmon-exciton coupling, modern trends, and perspectives in the study of hetero-systems semiconductor–metal, metal–2D material, semiconductor–molecule, etc. Semiconductor-metal hybrid nanostructures open up exciting opportunities for the study of quantum phenomena, optical processes, and multiparticle interactions and confidently lead to application in new photonics devices.
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He, Zhicong, Fang Li, Yahui Liu, Fuqiang Yao, Litu Xu, Xiaobo Han i Kai Wang. "Principle and Applications of the Coupling of Surface Plasmons and Excitons". Applied Sciences 10, nr 5 (4.03.2020): 1774. http://dx.doi.org/10.3390/app10051774.
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Surface plasmons have been attracting increasing attention and have been studied extensively in recent decades because of their half-light and half-material polarized properties. On the one hand, the tightly confined surface plasmonic mode may reduce the size of integrated optical devices beyond the diffraction limit; on the other hand, it provides an approach toward enhancement of the interactions between light and matter. In recent experiments, researchers have realized promising applications for surface plasmons in quantum information processing, ultra-low-power lasers, and micro-nano processing devices by using plasmonic structures, which have demonstrated their superiority over traditional optics structures. In this paper, we introduce the theoretical principle of surface plasmons and review the research work related to the interactions between plasmons and excitons. Some perspectives with regard to the future development of plasmonic coupling are also outlined.
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Nishimura, Takuya, i Taiichi Otsuji. "TERAHERTZ POLARIZATION CONTROLLER BASED ON ELECTRONIC DISPERSION CONTROL OF 2D PLASMONS". International Journal of High Speed Electronics and Systems 17, nr 03 (wrzesień 2007): 547–55. http://dx.doi.org/10.1142/s0129156407004734.
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We numerically investigated the possibility of terahertz polarization controller based on electronic dispersion control of two dimensional (2D) plasmon gratings in semiconductor heterostructure material systems. Taking account of the Mikhailov's dispersive plasmonic conductivity model, the electromagnetic field emission properties of the gated 2D plasmon gratings were numerically analyzed with respect to the density (n) of electrons by using in-house Maxwell's FDTD (finite difference time domain method) simulator. When n is low under a constant drift-velocity condition, the fundamental plasmon mode is excited, being coupled with the radiative zeroth mode of transverse electric (TE) waves. When n exceeds a threshold level, the second harmonic mode of plasmon is predominantly excited, being coupled with the non-radiative first mode of TE waves. We numerically demonstrated that if a grating mesh of 2D plasmons is formed where two independent 2D plasmon gratings are combined orthogonally, the structure can act as a polarization controller by electronically controlling the two axial plasmonic dispersions.
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Odom, Teri W. "Materials Screening and Applications of Plasmonic Crystals". MRS Bulletin 35, nr 1 (styczeń 2010): 66–73. http://dx.doi.org/10.1557/mrs2010.618.
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AbstractSurface plasmon polaritons are responsible for various optical phenomena, including negative refraction, enhanced optical transmission, and nanoscale focusing. Although many materials support plasmons, the choice of metal for most applications has been based on traditional plasmonic materials, such as Ag and Au, because there have been no side-by-side comparisons of different materials on well-defined, nanostructured surfaces. This article will describe how a multiscale patterning approach based on soft interference lithography can be used to create plasmonic crystals with different unit cell shapes—circular holes or square pyramids—which can be used as a platform to screen for new materials. The dispersion diagrams of plasmonic crystals made from unconventional metals will be presented, and the implications of discovering new optical coupling mechanisms and protein-sensing substrates based on Pd will be described. Finally, the opportunities enabled by this plasmonic library to dial into specific resonances for any angle or material will be discussed.
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Кособукин, В. А. "Спектроскопия плазмон-экситонов в наноструктурах полупроводник-металл". Физика твердого тела 60, nr 8 (2018): 1606. http://dx.doi.org/10.21883/ftt.2018.08.46256.18gr.
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AbstractThe results of the theory considering mixed plasmon-excitonic modes and their spectroscopy are presented. The plasmon-excitons are formed owing to strong Coulomb coupling between quasi-two-dimensional excitons of a quantum well and dipole plasmons of nanoparticles. The effective polarizability associated with a nanoparticle is calculated in a self-consistent approximation taking into account the local field determined by in-layer dipole plasmons and their image charges due to the excitonic polarization of a near quantum well. The spectra of elastic scattering and specular reflection of light are investigated in cases of a single silver nanoparticle and a monolayer of such particles situated in close proximity to a quantum well GaAs/AlGaAs. The optical spectra show a two-peak structure with a deep and narrow dip in the resonant range of plasmon-excitons. Propagation of plasmon-excitonic polaritons is discussed for periodic superlattices whose unit cell consists of a quantum well and a layer of metal nanoparticles. The superradiance regime originating in the Bragg diffraction of plasmon-excitonic polaritons by the superlattice is investigated. It is shown that the broad spectrum of plasmonic reflection depending on the number of unit cells in a superlattice also has a narrow dip at the exciton frequency.
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Tene, Talia, Marco Guevara, Jiří Svozilík, Diana Coello-Fiallos, Jorge Briceño i Cristian Vacacela Gomez. "Proving Surface Plasmons in Graphene Nanoribbons Organized as 2D Periodic Arrays and Potential Applications in Biosensors". Chemosensors 10, nr 12 (3.12.2022): 514. http://dx.doi.org/10.3390/chemosensors10120514.
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Surface-plasmon-based biosensors have become excellent platforms for detecting biomolecular interactions. While there are several methods to exciting surface plasmons, the major challenge is improving their sensitivity. In relation to this, graphene-based nanomaterials have been theoretically and experimentally proven to increase the sensitivity of surface plasmons. Notably, graphene nanoribbons display more versatile electronic and optical properties due to their controllable bandgaps in comparison to those of zero-gap graphene. In this work, we use a semi-analytical approach to investigate the plasmonic character of two-dimensional graphene nanoribbon arrays, considering free-standing models, i.e., models in which contact with the supporting substrate does not affect their electronic properties. Our findings provide evidence that the plasmon frequency and plasmon dispersion are highly sensitive to geometrical factors or the experimental setup within the terahertz regime. More importantly, possible applications in the molecular detection of lactose, α-thrombin, chlorpyrifos-methyl, glucose, and malaria are discussed. These predictions can be used in future experiments, which, according to what is reported here, can be correctly fitted to the input parameters of possible biosensors based on graphene nanoribbon arrays.
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Fan, Zhiyuan, Shourya Dutta-Gupta, Ran Gladstone, Simeon Trendafilov, Melissa Bosch, Minwoo Jung, Ganjigunte R. Swathi Iyer i in. "Electrically defined topological interface states of graphene surface plasmons based on a gate-tunable quantum Bragg grating". Nanophotonics 8, nr 8 (10.07.2019): 1417–31. http://dx.doi.org/10.1515/nanoph-2019-0108.
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AbstractA periodic metagate is designed on top of a boron nitride-graphene heterostructure to modulate the local carrier density distribution on the monolayer graphene. This causes the bandgaps of graphene surface plasmon polaritons to emerge because of either the interaction between the plasmon modes, which are mediated by the varying local carrier densities, or their interaction with the metal gates. Using the example of a double-gate graphene device, we discuss the tunable band properties of graphene plasmons due to the competition between these two mechanisms. Because of this, a bandgap inversion, which results in a Zak phase switching, can be realized through electrostatic gating. Here we also show that an anisotropic plasmonic topological edge state exists at the interface between two graphene gratings of different Zak phases. While the orientation of the dipole moments can differentiate the band topologies of each graphene grating, the angle of radiation remains a tunable property. This may serve as a stepping stone toward active control of the band structures of surface plasmons for potential applications in optical communication, wave steering, or sensing.
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Yeshchenko, O. A., A. O. Bartenev, A. P. Naumenko, N. V. Kutsevol, Iu I. Harahuts i A. I. Marinin. "Laser-Driven Aggregation in Dextran–Graft–PNIPAM/Silver Nanoparticles Hybrid Nanosystem: Plasmonic Effects". Ukrainian Journal of Physics 65, nr 3 (26.03.2020): 254. http://dx.doi.org/10.15407/ujpe65.3.254.
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The laser-induced aggregation in the thermosensitive dextran grafted-poly(N-isopropylacrylamide) copolymer/Ag nanoparticles (D–g–PNIPAM/AgNPs) hybrid nanosystem in water has been observed. The laser-induced plasmonic heating of Ag NPs causes the Lower Critical Solution Temperature (LCST) conformation transition in D–g–PNIPAM/AgNPs macromolecules which shrink during the transition. The shrinking decreases sharply the distance between the silver nanoparticles that launches the aggregation of Ag NPs and the appearance of plasmonic attractive optical forces acting between the nanoparticles. It has been shown that the approach of the laser wavelength to the surface plasmon resonance in Ag nanoparticles leads to a significant strengthening of the observed aggregation, which proves its plasmon nature. The laser-induced transformations in the D–g–PNIPAM/AgNPs nanosystem have been found to be essentially irreversible that differs principally them from the temperature-induced transformations. Such fundamental difference proves the crucial role of the optical forces arising due to the excitation of surface plasmons in Ag NPs.
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Zotov, A. A., i N. V. Zverev. "Longitudinal Plasmons in a Thin Flat Conductive Film". Journal of Physics: Conference Series 2056, nr 1 (1.10.2021): 012020. http://dx.doi.org/10.1088/1742-6596/2056/1/012020.
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Abstract The longitudinal plasmons in the plasma of conductivity electrons between the surfaces of a thin flat conductive film are investigated. It is shown that these plasmons lead to a resonant behaviour of the optical power coefficient of E-wave interaction with this film. The conditions for appearance of these plasmon resonances are found, and peculiarities of the dependence of the resonant frequencies on the film characteristics are revealed.
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Milekhin, Ilya A., Sergei A. Kuznetsov, Ekaterina E. Rodyakina, Alexander G. Milekhin, Alexander V. Latyshev i Dietrich R. T. Zahn. "Localized surface plasmons in structures with linear Au nanoantennas on a SiO2/Si surface". Beilstein Journal of Nanotechnology 7 (26.10.2016): 1519–26. http://dx.doi.org/10.3762/bjnano.7.145.
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The study of infrared absorption by linear gold nanoantennas fabricated on a Si surface with underlying SiO2 layers of various thicknesses allowed the penetration depth of localized surface plasmons into SiO2 to be determined. The value of the penetration depth derived experimentally (20 ± 10 nm) corresponds to that obtained from electromagnetic simulations (12.9–30.0 nm). Coupling between plasmonic excitations of gold nanoantennas and optical phonons in SiO2 leads to the appearance of new plasmon–phonon modes observed in the infrared transmission spectra the frequencies of which are well predicted by the simulations.
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Mithun, K. P., Srabani Kar, Abinash Kumar, D. V. S. Muthu, N. Ravishankar i A. K. Sood. "Dirac surface plasmons in photoexcited bismuth telluride nanowires: optical pump-terahertz probe spectroscopy". Nanoscale 13, nr 17 (2021): 8283–92. http://dx.doi.org/10.1039/d0nr09087e.
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Yan, Xiaofei, Qi Lin, Lingling Wang i Guidong Liu. "Active absorption modulation by employing strong coupling between magnetic plasmons and borophene surface plasmons in the telecommunication band". Journal of Applied Physics 132, nr 6 (14.08.2022): 063101. http://dx.doi.org/10.1063/5.0100211.
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The tunable and highly confined plasmon in 2D materials paves the way for designing 2D materials capable of manipulating light on a subwavelength scale, making them suitable for the design of optical modulators in ultracompact sizes. Herein, a continuously adjustable modulator in the telecommunication band is theoretically presented by the strong coupling between the magnetic plasmons (MPs) and borophene surface plasmons (BSPs). A remarkable Rabi splitting is observed and the coupling process is theoretically investigated by the model of two coupled oscillators. Results show that the splitting energy is determined by the coupling strength, which can be modulated by adjusting the distance between the borophene monolayer and silver grating. Moreover, by manipulating the electron density of the borophene to drive both two modes coupled or decoupled, the absorption can be continuously adjustable almost from 0 to 1 at 1544 nm, and the maximum modulation depth can be up to 94.8%. This work may provide a method to enhance light–matter interactions by the coupled multi-modes and design borophene-based plasmonic modulator.
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Kosobukin, V. A. "Plasmon-excitonic polaritons in metal-semiconductor nanostructures with quantum wells". Физика и техника полупроводников 52, nr 5 (2018): 502. http://dx.doi.org/10.21883/ftp.2018.05.45846.35.
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AbstractA theory of plasmon-exciton coupling and its spectroscopy is developed for metal-semiconductor nanostructures. Considered as a model is a periodic superlattice with cells consisting of a quantum well and a layer of metal nanoparticles. The problem is solved self-consistently using the electrodynamic Green’s functions taking account of resonant polarization. Coulomb plasmon-exciton interaction is associated with the dipole surface plasmons of particles and their image charges due to excitonic polarization of neighboring quantum well. Optical reflection spectra are numerically investigated for superlattices with GaAs/AlGaAs quantum wells and silver nanoparticles. Superradiant regime caused by one-dimensional Bragg diffraction is studied for plasmonic, excitonic and plasmon-excitonic polaritons depending on the number of supercells. The plasmon-excitonic Rabi splitting is shown to occur in reflectivity spectra of resonant Bragg structures.
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Sun, Xiaoli, Lingrui Chu, Feng Ren, Yuechen Jia i Feng Chen. "Plasmon-enhanced third-order optical nonlinearity of monolayer MoS2". Applied Physics Letters 120, nr 19 (9.05.2022): 193101. http://dx.doi.org/10.1063/5.0091855.
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Transition metal dichalcogenides (TMDs) have attracted broad interest in photonics owing to their unique electric band structures, which triggers various applications for functional devices. However, the optical absorbance of TMDs is relatively low because of the atomic-scale thickness, limiting further development of TMDs-based nonlinear optical devices. Here, we propose an effective method to enhance the nonlinear optical properties of TMDs using plasmons, which are from embedded silver (Ag) nanoparticles (NPs) inside the fused silica substrate. In such a configuration, the third-order nonlinear absorption coefficient of MoS2 with non-contact Ag NPs is one order of magnitude higher than that of pure monolayer MoS2 under excitation of 515 nm light, and at 1030 nm, the reverse saturable absorption switches to the saturable absorption due to the plasmonic implication. In addition, the mechanism of plasmon-enhanced nonlinear optical properties is confirmed by results of both transient absorption spectroscopy and near-field electromagnetic field simulation. This study on plasmon-enhanced third-order nonlinearity of MoS2 expands the boundaries of TMDs-based optical nonlinearity engineering.
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Poudel, Yuba, Sairaman Seetharaman, Swastik Kar, Francis D’Souza i Arup Neogi. "Plasmon-Induced Enhanced Light Emission and Ultrafast Carrier Dynamics in a Tunable Molybdenum Disulfide-Gallium Nitride Heterostructure". Materials 15, nr 21 (22.10.2022): 7422. http://dx.doi.org/10.3390/ma15217422.
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The effect of localized plasmon on the photoemission and absorption in hybrid molybdenum disulfide-Gallium nitride (MoS2-GaN) heterostructure has been studied. Localized plasmon induced by platinum nanoparticles was resonantly coupled to the bandedge states of GaN to enhance the UV emission from the hybrid semiconductor system. The presence of the platinum nanoparticles also increases the effective absorption and the transient gain of the excitonic absorption in MoS2. Localized plasmons were also resonantly coupled to the defect states of GaN and the exciton states using gold nanoparticles. The transfer of hot carriers from Au plasmons to the conduction band of MoS2 and the trapping of excited carriers in MoS2 within GaN defects results in transient plasmon-induced transparency at ~1.28 ps. Selective optical excitation of the specific resonances in the presence of the localized plasmons can be used to tune the absorption or emission properties of this layered 2D-3D semiconductor material system.
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Kluczyk-Korch, Katarzyna, Christin David, Witold Jacak i Janusz Jacak. "Application of Core–Shell Metallic Nanoparticles in Hybridized Perovskite Solar Cell—Various Channels of Plasmon Photovoltaic Effect". Materials 12, nr 19 (29.09.2019): 3192. http://dx.doi.org/10.3390/ma12193192.
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We analyze the microscopic mechanism of the improvement of solar cell efficiency by plasmons in metallic components embedded in active optical medium of a cell. We focus on the explanation of the observed new channel of plasmon photovoltaic effect related to the influence of plasmons onto the internal cell electricity beyond the previously known plasmon mediated absorption of photons. The model situation we analyze is the hybrid chemical perovskite solar cell CH 3 NH 3 PbI 3 − α Cl α with inclusion of core–shell Au/Si0 2 nanoparticles filling pores in the Al 2 O 3 or TiO 2 porous bases at the bottom of perovskite layer, application of which improved the cell efficiency from 10.7 to 11.4% and from 8.4 to 9.5%, respectively, as demonstrated experimentally, mostly due to the reduction by plasmons of the exciton binding energy.