Готові списки джерел за темами / Optical Plasmons

Добірка наукової літератури з теми "Optical Plasmons"

Автор: Grafiati
Опубліковано: 7 вересня 2023

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Статті в журналах з теми "Optical Plasmons"

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Babicheva, Viktoriia E. "Optical Processes behind Plasmonic Applications." Nanomaterials 13, no. 7 (April 3, 2023): 1270. http://dx.doi.org/10.3390/nano13071270.

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Анотація:
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, and Ann Roberts. "Plasmonic circuits for manipulating optical information." Nanophotonics 6, no. 3 (October 26, 2016): 543–59. http://dx.doi.org/10.1515/nanoph-2016-0131.

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Анотація:
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., and Mark S. Rudner. "Chiral plasmons without magnetic field." Proceedings of the National Academy of Sciences 113, no. 17 (April 11, 2016): 4658–63. http://dx.doi.org/10.1073/pnas.1519086113.

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Анотація:
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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4

Wang, Jingyu, Min Gao, Yonglin He, and Zhilin Yang. "Ultrasensitive and ultrafast nonlinear optical characterization of surface plasmons." APL Materials 10, no. 3 (March 1, 2022): 030701. http://dx.doi.org/10.1063/5.0083239.

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Анотація:
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 та В. В. Попов. "Замедление терагерцовых плазменных волн в конической структуре с графеном, накачиваемым с помощью оптических плазменных волн". Физика и техника полупроводников 55, № 6 (2021): 518. http://dx.doi.org/10.21883/ftp.2021.06.50920.9525.

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Анотація:
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, no. 12 (December 5, 2020): 1187. http://dx.doi.org/10.3390/coatings10121187.

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Анотація:
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, and Prabhat Verma. "White nanolight source for optical nanoimaging." Science Advances 6, no. 23 (June 2020): eaba4179. http://dx.doi.org/10.1126/sciadv.aba4179.

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Анотація:
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, and Michael J. Naughton. "Optical and electrical mappings of surface plasmon cavity modes." Nanophotonics 3, no. 1-2 (April 1, 2014): 33–49. http://dx.doi.org/10.1515/nanoph-2013-0038.

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Анотація:
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, no. 6 (June 2019): 483–87. http://dx.doi.org/10.1139/cjc-2018-0365.

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Анотація:
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, no. 2 (February 2013): 117–25. http://dx.doi.org/10.1366/12-06861.

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Анотація:
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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Більше джерел

Дисертації з теми "Optical Plasmons"

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Jory, Michael John. "Optical sensing with surface plasmons." Thesis, University of Exeter, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240308.

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Lin, Ling. "Optical Manipulation Using Planar/Patterned Metallo-dielectric Multilayer Structures." Thesis, University of Canterbury. Electrical and Computer Engineering, 2008. http://hdl.handle.net/10092/1249.

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Анотація:
Tailoring surface plasmon (SP) resonances using metallic nanostructures for optical manipulation has been widely investigated in recent years; and there are many puzzles yet to be solved in this relatively new area. This thesis covers the study of the interaction of light with SP-supporting planar/patterned metallo-dielectric multilayer structures. Two separate, but closely related subjects were investigated using such structures, which are: SP-assisted optical transmission and optical metamaterials. The physical mechanisms of the SP-assisted transmission phenomenon were studied using planar/grating and planar/hole-array multilayer structures. Extraordinary light transmission has been demonstrated through experimental work and simulations for both arrangements; and the effects of different structural parameters on the transmission efficiencies of the structures were analyzed systematically. The interplays of the surface plasmon polaritons (SPPs) and localized surface plasmons (LSPs) in the extraordinary optical transmission (EOT) phenomenon were identified. The potential of the planar/hole-array multilayer structures as optical magnetic metamaterials was evaluated using two independent electromagnetic simulation techniques. The ability of such structures to produce strong magnetic resonances from infrared down to visible side of spectrum was revealed. The methods of tuning the magnetic response of the structures were suggested. A novel design of optical metamaterial based on high-order multipolar resonances in a single-layer plasmonic structure was also proposed. Numerical results from two different computation methods indicate that a simultaneously negative permittivity and permeability can be achieved in such a structure.
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3

Scales, Christine. "Magneto-plasmons in optical slab waveguides." Thesis, University of Ottawa (Canada), 2004. http://hdl.handle.net/10393/26765.

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Анотація:
The effect of an externally applied magnetic field on the propagation characteristics of a plasmon-polariton wave supported by an infinitely wide thin metal waveguide was investigated. In order to do so, the dispersion relation was derived, from Maxwell's equations, enabling accurate modelling of the situation of interest. The general dispersion relation, including the constraint equation, for magneto-plasmons was derived in general, and then, specifically for a magnetic field applied along three orthogonal cartesian axes. The losses in the metal were included in the dispersion equation so that a better understanding of the influence of an externally applied magnetic field may be provided. The dispersion relation is used as the basis of a software model of magneto-plasmons in thin metal films. This model is validated against specific cases in the literature with and without an externally applied magnetic field. The specific formulations in the literature were deemed to be incorrect, and have been corrected and the results have been interpreted. The model is then used to simulate thin gold films bounded by silicon dioxide at an infrared wavelength. The modelling results include the effect of the externally applied magnetic field on the propagation constant and the corresponding field components for all three Cartesian orientations of externally applied magnetic field. The results from these simulations are presented and interpreted. (Abstract shortened by UMI.)
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George, Sebastian. "Optical and Magneto-Optical Measurements of Plasmonic Magnetic Nanostructures." Thesis, Uppsala universitet, Materialfysik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-229511.

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Анотація:
At the interface between a metal and dielectric, it is possible for an electromagnetic wave to couple with the conduction electrons of the metal to create a coupled oscillation known as a surface plasmon. These surface plasmons can exhibit properties which are not shared with their purely electronic or electromagnetic components. Such unique properties include the ability to transmit plasmonic waves through sub-wavelength spaces, opening up the possibility of combining the high data density seen in photonics-based information technologies with the nanometer-scale electronic components of modern integrated circuitry. Other plasmon properties such as the highly resonant nature of plasmon excitation may potentially lend themselves to novel cancer treatments and medical probing techniques. In order to develop such technologies, a deeper understanding of surface plasmons and their relationship with a material’s properties and structure is necessary. In the present work, angle- and energy-resolved optical measurements for a square lattice of circular Fe20Pd80 islands are presented in the form of reflectivity and transmission maps, along with higher resolution reflectivity, transmission, and TMOKE measurements for a few specific wavelengths. A theoretical model describing the connection between plasmonic and magneto-optical behavior is described and compared with the experimental data, showing a very high correlation.
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Auguié, Baptiste. "Optical properties of gold nanostructures." Thesis, University of Exeter, 2009. http://hdl.handle.net/10036/73955.

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Анотація:
The optical properties of gold in the visible are dominated by the response of the free conduction electrons to light. In gold nanostructures, the surface charge density adopts a configuration that is constrained by the shape of the nanoparticles. As a result, the scattering of light by gold nanoparticles exhibits a resonant response characterised by a strong scattering and absorption in a narrow range of frequencies. The spectral range of this \emph{localised surface plasmon resonance} (LSPR) can be tuned by varying the size and shape of the gold nanoparticle --- the nanoparticles act as nanoscale antennas for the visible light. Confirmation of this scaling rule is obtained by conducting experiments with nanoparticles of varying size and aspect ratio. Such particles are fabricated by electron-beam lithography, and characterised by dark-field spectroscopy. Not only does the LSPR shift in frequency with a change of particle size, but its spectral lineshape is also modified. The intensity and width of the LSPR are dictated by a variety of factors that are related to the intrinsic material properties (the complex dielectric function of gold), and to the particle geometry and environment. The optical response of small gold nanorods is well described by a simple oscillating dipole model --- the incident electromagnetic field induces a current in the particle that re-radiates light (scattering). A series of refinements can be made to model more accurately the optical response of realistic particles. If the dipole moment characterising the particle is allowed to vary in phase across the particle, retardation effects provide a correction for the effective dipole moment of the particle. As the particle size approaches the wave length in the surrounding medium, the dipolar approximation breaks down and higher order multipoles need to be considered. The Mie theory provides a very accurate description of the response of spheres of arbitrary size. Further, the T-matrix and other numerical techniques can be employed to accurately reproduce the scattering properties of particles of arbitrary shapes. When the scattering sample consists of a collection of gold nanoparticles, the collective optical response is affected by two key factors. First, the measured LSPR is a convolution of the distribution of particle sizes with the individual response of a single particle. This leads to an inhomogeneous broadening of the LSPR lineshape. Second, the light that is scattered by one such particle near resonance can strongly affect its neighbours which scatter light in proportion to the net field they experience, that is the sum of the incident field plus the perturbation arising from the neighbouring particles. The onset of such multiple scattering events is observed even for particle separations that are several times larger than the particle size. Several regimes of interaction can be distinguished according to the ratio separation / wavelength. First, when the particles are in close proximity (separation $\ll$ wavelength), near-field interactions dominate and result in a spectral shift of the LSPR accompanied with a spectral broadening. Second, when the separation is commensurate with the wavelength, a coherent interaction can develop that couples a large number of particles. In ordered arrays, such coupling gives rise to a geometrical resonance that can strongly affect the LSPR of the particles. In particular a sharp spectral feature is observed that depends on both the single particle response and the geometrical arrangement of the particles in the array. The coherence of such multiple scattering in diffractive arrays of gold nanoparticles can be broken by introducing disorder in the distribution of particle sizes, or in the particle positions. The optical properties of an irregular array reflect the departure from a periodic system and the spectral lineshape evolves as the level of disorder is increased. In the limit of uncorrelated positions, the diffractive coupling is suppressed and the response of the collection of the particles rejoins the response of isolated particles.
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Vemuri, Padma Rekha. "Surface Plasmon Based Nanophotonic Optical Emitters." Thesis, University of North Texas, 2005. https://digital.library.unt.edu/ark:/67531/metadc5584/.

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Анотація:
Group- III nitride based semiconductors have emerged as the leading material for short wavelength optoelectronic devices. The InGaN alloy system forms a continuous and direct bandgap semiconductor spanning ultraviolet (UV) to blue/green wavelengths. An ideal and highly efficient light-emitting device can be designed by enhancing the spontaneous emission rate. This thesis deals with the design and fabrication of a visible light-emitting device using GaN/InGaN single quantum well (SQW) system with enhanced spontaneous emission. To increase the emission efficiency, layers of different metals, usually noble metals like silver, gold and aluminum are deposited on GaN/InGaN SQWs using metal evaporator. Surface characterization of metal-coated GaN/InGaN SQW samples was carried out using atomic force microscopy (AFM) and scanning electron microscopy (SEM). Photoluminescence is used as a tool for optical characterization to study the enhancement in the light emitting structures. This thesis also compares characteristics of different metals on GaN/InGaN SQW system thus allowing selection of the most appropriate material for a particular application. It was found out that photons from the light emitter couple more to the surface plasmons if the bandgap of former is close to the surface plasmon resonant energy of particular metal. Absorption of light due to gold reduces the effective mean path of light emitted from the light emitter and hence quenches the quantum well emission peak compared to the uncoated sample.
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Iyer, Srinivasan. "Effects of surface plasmons in subwavelength metallic structures." Doctoral thesis, KTH, Optik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-103613.

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Анотація:
The study of optical phenomena related to the strong electromagnetic response of noble metals (silver (Ag) and gold (Au) being most popular) over the last couple of decades has led to the emergence of a fast growing research area called plasmonics named after 'surface plasmons' which are electron density waves that propagate along the interface of a metal and a dielectric medium. Surface plasmons are formed by the coupling of light to the electrons on the metal surface subject to the fulfillment of certain physical conditions and they are bound to the metal surface. Depending on whether the metallic medium is a continuous film or a structure having dimensions less than or comparable to the wavelength of the exciting light, propagating or localized surface plasmons can be excited. The structure can be either a hole or an arbitrary pattern in a metal film, or a metallic particle. An array of subwavelength structures can behave as an effective homogeneous medium to incident light and this is the basis of a new class of media known as metamaterials. Metallic metamaterials enable one to engineer the electromagnetic response to  incident light and provide unconventional optical properties like negative refractive index as one prominent example. Metamaterials exhibiting negative index (also called negative index materials (NIMs)) open the door for super resolution imaging  and development of invisibility cloaks. However, the only problem affecting the utilization of plasmonic media to their fullest potential is the intrinsic loss of the metal, and it becomes a major issue especially at visible-near infrared (NIR) frequencies. The frequency of the surface plasmon is the same as that of the exciting light but its wavelength could be as short as that of X-rays. This property allows light of a given optical frequency to be conned into very small volumes via subwave lengthmetallic structures, that can be used to develop ecient sensors, solar cells, antennas and ultrasensitive molecular detectors to name a few applications. Also, interaction of surface plasmons excited in two or more metallic subwavelength structures in close proximity inuences the far-eld optical properties of the overall coupled system. Some eects of plasmonic interaction in certain coupled particles include polarization conversion, optical activity and transmission spectra mimicking electromagnetically-induced transparency (EIT) as observed in gas based atomicsy stems. In this thesis, we mainly focus on the optical properties of square arrays of certain plasmonic structures popularly researched in the last decade. The structures considered are as follows: (1) subwavelength holes of a composite hole-shape providing superior near-eld enhancement such as two intersecting circles (called' double hole') in an optically thick Au/Ag lm, (2) double layer shnets, (3) subwavelength U-shaped particles and (4) rectangular bars. The entire work is based on electromagnetic simulations using time and frequency domain methods. Au/Ag lms with periodic subwavelength holes provide extraordinarily high transmission of light at certain wavelengths much larger than the dimension of the perforations or holes. The spectral positions of the maxima depend on the shape of the hole and the intra-hole medium, thereby making such lms function as a refractive index sensor in the transmission mode. The sensing performance of the double-hole geometry is analyzed in detail and compared to rectangular holes. Fishnet metamaterials are highly preferred when it comes to constructing a NIM at optical frequencies. A shnet design that theoretically oers a negative refractive index with least losses at telecommunication wavelengths (1.4 1.5 microns) is presented. U-shaped subwavelength metallic particles, in particular single-slit split-ring resonators (SSRRs), provide a large negative response to the magnetic eld of light at a specic resonance frequency. The spectral positions of the structural resonances of the U-shaped particle can be found from its array far field transmission spectrum at normal incidence. An effort is made to clarify our understanding of these resonances with the help of localized surface plasmon modes excited in the overall particle. From an application point of view, it is found that a planar square array of SSRRs eectively functions as an optical half-wave waveplate at the main resonance frequency by creating a polarization in transmission that is orthogonal to that of incident light. A similar waveplate eect can be obtained purely by exploiting the near-eld interaction of dierently oriented neighbouring SSRRs. The physical reasons behind polarization conversion in dierent SSRR-array systems are discussed. A rectangular metallic bar having its dipolar resonance in the visible-NIR is called a nanoantenna, owing to its physical length in the order of nanometers. The excitation of localized surface plasmons, metal dispersion and the geometry of the rectangular nanoantenna make an analytical estimation of the physical length of the antenna from the desired dipolar resonance dicult. A practical map of simulated resonance values corresponding to a variation in geometrical parameters of Au bar is presented. A square array of a coupled plasmonic system comprising of three nanoantennas provides a net transmission response that mimicks the EIT effect. The high transmission spectral window possesses a peculiar dispersion profile that enables light with frequencies in that region to be slowed down. Two popular designs of such plasmonic EIT systems are numerically characterized and compared.

QC 20121017

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Kurth, Martin L. "Plasmonic nanofocusing and guiding structures for nano-optical sensor technology." Thesis, Queensland University of Technology, 2018. https://eprints.qut.edu.au/118670/1/Martin_Kurth_Thesis.pdf.

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Анотація:
This thesis investigated factors affecting the sensitivity of nano-optical sensors that could be used for the detection of trace amounts of explosives and environmental pollutants in air. By delivering air to regions of enhanced electric field produced by metallic nanostructures, as well as using structures that localise and guide light at nanoscale levels, detection limits can be reduced.
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Jia, Kun. "Optical detection of (bio)molecules." Thesis, Troyes, 2013. http://www.theses.fr/2013TROY0032/document.

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Анотація:
Les biocapteurs optiques ont connu une évolution sans précédent au cours des dernières années, principalement en raison de la forte interaction entre la biotechnologie, l’optique et la chimie des matériaux. Dans cette thèse, deux différentes plates-formes de biocapteurs optiques ont été conçues pour la détection sensible et spécifique des biomolécules. Plus précisément, le premier système de détection optique est construit sur la base de la bioluminescence de cellules bactériennes d'Escherichia coli génétiquement modifiées. L’émission de lumière induite par cette interaction peut donc être utilisée pour la détection des substances toxiques. Le second système utilise des nanoparticules de métaux précieux (or et argent) aux propriétés plasmoniques accordables qui permettent de sonder les interactions des biomolécules spécifiques à l'interface nano-bio par la résonance plasmonique de surface (LSPR). Ces nanoparticules ont été obtenues par traitement thermique à haute température d’un film métallique déposé sur du verre à l’aide d’une grille de TEM ou déposé sur une couche de bactéries fixée sur le verre. Après une optimisation appropriée des nanostructures métalliques en termes de morphologie et de fonctionnalisation, une sensibilité élevée et une grande spécificité peuvent être simultanément obtenues avec ces immunocapteurs plasmonique. Ces deux plateformes ont été utilisées pour détecter des pesticides comme le carbofuran et l’atrazine
Optical biosensors have witnessed unprecedented developments over recent years, mainly due to the lively interplay between biotechnology, optical physics and materials chemistry. In this thesis, two different optical biosensing platforms have been designed for sensitive and specific detection of (bio)molecules. Specifically, the first optical detection system is constructed on the basis of bioluminescence derived from engineered Escherichia coli bacterial cells. Upon stressed by the toxic compounds, the bacterial cells produce light via a range of complex biochemical reactions in vivo and the resulted bioluminescent evolution thus can be used for toxicant detection. The bacterial bioluminescent assays are able to provide competitive sensitivity, while they are limited in the specificity. Therefore, the second optical detection platform is built on the localized surface plasmon resonance (LSPR) immunosensors. In this optical biosensor, the noble metal (gold and silver) nanoparticles with tunable plasmonic properties are used as transducer for probing the specific biomolecules interactions occurred in the nano-bio interface. These nanoparticles were obtained after a high temperature thermal treatment of an initially thin-metallic film deposited on a glass substrate through a TEM grid or on a bacteria layer fixed on the glass. After appropriate optimization on metal nanostructures morphology and surface biomodification, the applicable sensitivity and specificity can be both guaranteed in this LSPR immunosensor
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Chinowsky, Timothy Mark. "Optical multisensors based on surface plasmon resonance /." Thesis, Connect to this title online; UW restricted, 2000. http://hdl.handle.net/1773/5857.

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Книги з теми "Optical Plasmons"

1

Sönnichsen, Carsten. Plasmons in metal nanostructures. Göttingen: Cuvillier, 2001.

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2

V, Klimov V. Nanoplazmonika. Moskva: Fizmatlit, 2010.

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1957-, Shalaev Vladimir M., ed. Nanoplasmonics. Amsterdam: Elsevier, 2006.

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Talpur, Abdul Rahim. Optical remote sensing with intensity referenced signals and surface plasmons. Salford: University of Salford, 1988.

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Stockman, Mark I. Plasmonics: Metallic nanostructures and their optical properties IX : 21-25 August 2011, San Diego, California, United States. Edited by SPIE (Society). Bellingham, Wash: SPIE, 2011.

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1975-, Qiu Min, ed. Optical properties of nanostructures. Singapore: Pan Stanford, 2011.

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J, Halas Naomi, and Society of Photo-optical Instrumentation Engineers., eds. Plasmonics: Metallic nanostructures and their optical properties : 3-5 August 2003, San Diego, California, USA. Bellingham, Wash., USA: SPIE, 2003.

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1966-, Kawata Satoshi, Shalaev Vladimir M. 1957-, Tsai Din P. 1959-, and Society of Photo-optical Instrumentation Engineers., eds. Plasmonics: Nanoimaging, nanofabrication, and their applications II : 16-17 August, 2006, San Diego, California, USA. Bellingham, Wash: SPIE, 2006.

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Stockman, Mark I. Plasmonics: Metallic nanostructures and their optical properties VI : 10-14 August 2008, San Diego, California, USA. Edited by Society of Photo-optical Instrumentation Engineers. Bellingham, Wash: SPIE, 2008.

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Luca, Dal Negro, ed. Materials for nanophotonics--plasmonics, metamaterials and light localization: Symposium held April 14-17, 2009, San Francisco, California, U.S.A. Warrendale, Pa: Materials Research Society, 2009.

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Частини книг з теми "Optical Plasmons"

1

Kajikawa, Kotaro. "Surface Plasmons." In Optical Properties of Advanced Materials, 67–92. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-33527-3_3.

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Schattschneider, Peter, and Bernard Jouffrey. "Plasmons and Related Excitations." In Springer Series in Optical Sciences, 151–224. Berlin, Heidelberg: Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/978-3-540-48995-5_3.

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Trügler, Andreas. "The World of Plasmons." In Optical Properties of Metallic Nanoparticles, 11–57. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-25074-8_2.

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Trügler, Andreas. "Imaging of Surface Plasmons." In Optical Properties of Metallic Nanoparticles, 131–47. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-25074-8_5.

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Hachtel, Jordan A. "Probing Plasmons in Three Dimensions." In The Nanoscale Optical Properties of Complex Nanostructures, 75–90. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-70259-9_5.

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Klingshirn, Claus F. "Optical Properties of Plasmons, Plasmon–Phonon Mixed States and of Magnons." In Semiconductor Optics, 301–8. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-28362-8_12.

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Eldlio, Mohamed, Franklin Che, and Michael Cada. "Drude-Lorentz Model of Semiconductor Optical Plasmons." In Lecture Notes in Electrical Engineering, 41–49. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-6818-5_4.

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BOUHELIER, ALEXANDRE, and LUKAS NOVOTNY. "NEAR-FIELD OPTICAL EXCITATION AND DETECTION OF SURFACE PLASMONS." In Springer Series in Optical Sciences, 139–53. Dordrecht: Springer Netherlands, 2007. http://dx.doi.org/10.1007/978-1-4020-4333-8_10.

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Boardman, A. D., K. Booth, and P. Egan. "Optical Guided Waves, Linear and Nonlinear Surface Plasmons." In Guided Wave Nonlinear Optics, 201–30. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2536-9_13.

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Li, Yilei. "Coupling of Strongly Localized Graphene Plasmons to Molecular Vibrations." In Probing the Response of Two-Dimensional Crystals by Optical Spectroscopy, 19–28. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-25376-3_3.

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Тези доповідей конференцій з теми "Optical Plasmons"

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Yunus, W. Mahmood Mat, Rosmiza Mokhtar, Mohd Maarof Moksin, Zainal Abidin Talib, and Zainul Abidin Hassan. "Optical characterisation of thin metal film using surface plasmons resonance." In Optical Interference Coatings. Washington, D.C.: Optica Publishing Group, 1997. http://dx.doi.org/10.1364/oic.1998.tua.8.

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The concept of surface plasmons originates from the application of Maxwell's to plasma whereby, the free electrons of a metal are treated as an electron fluid of high density (plasma). The density fluctuations occurring on the surface of such a fluid are called surface plasmons. Optical excitation of plasmons is not possible by direct impact of light on a metallic surface, so a prism coupling arrangement is needed. One possibility is to use a Kretschmann configuration [1] in which a p-polarized, collimated light beam passing through a glass prism undergoes total internal reflection (TIR) at glass-thin-metal film-dielectric interface. In this set-up plasmons are excited by (TIR) associated an evanescent wave after penetrating up to the metal-dielectric boundary. The surface plasmon resonance condition is given as,
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Quandt, Alexander, and Robert Warmbier. "About plasmons and plasmonics in graphene." In 2015 17th International Conference on Transparent Optical Networks (ICTON). IEEE, 2015. http://dx.doi.org/10.1109/icton.2015.7193345.

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Umakoshi, Takayuki, Yuika Saito, and Prabhat Verma. "Metallic tips for efficient plasmon nanofocusing and advanced optical nano-imaging." In JSAP-OSA Joint Symposia. Washington, D.C.: Optica Publishing Group, 2017. http://dx.doi.org/10.1364/jsap.2017.6a_a410_3.

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Plasmon nanofocusing, energy compression of propagating plasmons on a tapered metallic tip, is a promising tool for near-field scanning optical microscopy due to its unique properties such as background suppression and broadband property[1]. Although applications of plasmon nanofocusing has been still limited so far, it would make the plasmon-nanofocusing-based techniques more reliable and practical if an efficient fabrication method of metallic tips is established.
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Calajó, Giuseppe, Philipp K. Jenke, Lee A. Rozema, Philip Walther, Darrick E. Chang, and Joel D. Cox. "Nonlinear quantum logic with colliding graphene plasmons." In CLEO: Fundamental Science. Washington, D.C.: Optica Publishing Group, 2023. http://dx.doi.org/10.1364/cleo_fs.2023.fm2a.6.

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We present a theoretical study of a quantum logic gate based on two colliding plasmons in a single graphene nanoribbon with an intrinsic optical nonlinearity. The gate performance is only limited by the plasmon lifetime.
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5

Bukácek, Jan, and Jirí Homola. "Diffractive structures supporting long-range surface plasmons for plasmonic biosensing and imaging." In Optical Sensors 2023, edited by Robert A. Lieberman, Francesco Baldini, and Jiri Homola. SPIE, 2023. http://dx.doi.org/10.1117/12.2670445.

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Srituravanich, W., N. Fang, C. Sun, S. Durant, M. Ambati, and X. Zhang. "Plasmonic Lithography." In ASME 2004 3rd Integrated Nanosystems Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/nano2004-46023.

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As the next-generation technology moves below 100 nm mark, the need arises for a capability of manipulation and positioning of light on the scale of tens of nanometers. Plasmonic optics opens the door to operate beyond the diffraction limit by placing a sub-wavelength aperture in an opaque metal sheet. Recent experimental works [1] demonstrated that a giant transmission efficiency (>15%) can be achieved by exciting the surface plasmons with artificially displaced arrays of sub-wavelength holes. Moreover the effectively short modal wavelength of surface plasmons opens up the possibility to overcome the diffraction limit in the near-field lithography. This shows promise in a revolutionary high throughput and high density optical lithography. In this paper, we demonstrate the feasibility of near-field nanolithography by exciting surface plasmon on nanostructures perforated on metal film. Plasmonic masks of hole arrays and “bull’s eye” structures (single hole surrounded by concentric ring grating) [2] are fabricated using Focused Ion Beam (FIB). A special index matching spacer layer is then deposited onto the masks to ensure high transmissivity. Consequently, an I-line negative photoresist is spun on the top of spacer layer in order to obtain the exposure results. A FDTD simulation study has been conducted to predict the near field profile [3] of the designed plasmonic masks. Our preliminary exposure test using these hole-array masks demonstrated 170 nm period dot array patterns, well beyond the resolution limit of conventional lithography using near-UV wavelength. Furthermore, the exposure result obtained from the bull’s eye structures indicated the characteristics of periodicity and polarization dependence, which confirmed the contribution of surface plasmons.
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García de Abajo, Javier. "Quantum Effects in Graphene Plasmons." In Optical Fiber Communication Conference. Washington, D.C.: OSA, 2013. http://dx.doi.org/10.1364/ofc.2013.ow3f.3.

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Jacobson, Michele L., Thomas H. Reilly III, and Kathy L. Rowlen. "Harnessing surface plasmons." In Optical Science and Technology, the SPIE 49th Annual Meeting, edited by Gregory V. Hartland and Xiao-Yang Zhu. SPIE, 2004. http://dx.doi.org/10.1117/12.560503.

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García de Abajo, Javier. "Plasmons in Low Dimensional Structures." In Workshop on Optical Plasmonic Materials. Washington, D.C.: OSA, 2014. http://dx.doi.org/10.1364/opm.2014.ow2d.1.

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Huang, D. H., O. Roslyak, G. Gumbs, W. Pan, and A. A. Maradudin. "Nonlocal scattering tensor due to electromagnetic coupling of surface plasmons to dirac plasmons in graphene." In SPIE Optical Engineering + Applications, edited by Leonard M. Hanssen. SPIE, 2016. http://dx.doi.org/10.1117/12.2235226.

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Звіти організацій з теми "Optical Plasmons"

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Vo-Dinh, Tuan. Plasmonics-Enhanced Optical Imaging Systems for Bioenergy Research. Office of Scientific and Technical Information (OSTI), November 2022. http://dx.doi.org/10.2172/1899352.

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Thornberg, Steven Michael, Michael I. White, Arthur Norman Rumpf, and Kent Bryant Pfeifer. Surface plasmon sensing of gas phase contaminants using optical fiber. Office of Scientific and Technical Information (OSTI), October 2009. http://dx.doi.org/10.2172/973354.

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Ianno, N. J., and P. F. Williams. Advanced Optical Diagnostics of High Density Etching Plasmas. Fort Belvoir, VA: Defense Technical Information Center, December 2000. http://dx.doi.org/10.21236/ada391843.

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Camden, Jon P. Application of STEM/EELS to Plasmon-Related Effects in Optical Spectroscopy. Office of Scientific and Technical Information (OSTI), January 2015. http://dx.doi.org/10.2172/1168830.

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Singh, Anjali. What Is Optogenetics and How Does It Work? ConductScience, July 2022. http://dx.doi.org/10.55157/cs20220704.

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Optogenetics is a biotechnological method that combines optical systems and genetic engineering to control and monitor the functions of cells, tissues, and organisms. It involves using light-sensitive proteins called opsins to manipulate specific cells or regions with precision. This technique has revolutionized neuroscience, allowing researchers to study neural circuits and behavior by turning cells on and off. Opsins are categorized into microbial and animal types, each with specific functions. Optogenetic experiments require opsins, suitable plasmids or viral vectors, and a light source. This method has broad applications in neurology, animal behavior, and physiology, providing insights into various biological processes. It is used to map neural circuits, study diseases, and understand behaviors.
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Taylor, A. J., G. Omenetto, G. Rodriguez, C. W. Siders, J. L. W. Siders, and C. Downer. Determination of Optical-Field Ionization Dynamics in Plasmas through the Direct Measurement of the Optical Phase Change. Office of Scientific and Technical Information (OSTI), July 1999. http://dx.doi.org/10.2172/759189.

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I.Y. Dodin and N.J. Fisch. Storing, Retrieving, and Processing Optical Information by Raman Backscattering in Plasmas. Office of Scientific and Technical Information (OSTI), January 2002. http://dx.doi.org/10.2172/793016.

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Thomas C. Killian. Optical Studies of Strong Coupling and Recombination in Ultracold Neutral Plasmas. Office of Scientific and Technical Information (OSTI), August 2004. http://dx.doi.org/10.2172/827645.

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Krushelnick, K. M., W. Tighe, and S. Suckewer. X-ray laser studies using plasmas created by optical field ionization. Office of Scientific and Technical Information (OSTI), January 1995. http://dx.doi.org/10.2172/10111143.

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Stender, Anthony. Rod-like plasmonic nanoparticles as optical building blocks: how differences in particle shape and structural geometry influence optical signal. Office of Scientific and Technical Information (OSTI), January 2013. http://dx.doi.org/10.2172/1116721.

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