Дисертації з теми "Polaritonic waves"
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Rose, Alec Daniel. "All-angle negative refraction of photonic and polaritonic waves in three-dimensionally periodic structures." Thesis, Boston College, 2009. http://hdl.handle.net/2345/685.
Повний текст джерелаThough nature provides a plethora of materials to work with, their properties are very much restricted, forcing severe limitations on the devices that are built from them. A huge portion of current technology stands to be significantly advanced and even revolutionized by the emergence of a new class of “configurable” materials. This class, generally referred to as metamaterials, has become more feasible than ever due to advancements in nanotechnology and fabrication techniques. Notable among nature’s limitations is an ever-positive index of refraction. This barrier has only recently been broken, and the known paths to negative refraction are few and limited. This paper introduces two distinct three-dimensional crystals capable of all-angle negative refraction. One uses the familiar photonic band, while the other is the first of its kind to rely on polaritonic waves. Their mode structures are examined and a set of parameters are chosen at which a negative effective index of refraction can be harnessed for unrestricted sub-wavelength lensing, demonstrated via numerical simulation. This work is expected to enable experimental observation of polaritonic negative refraction and sub-wavelength lensing at microwave frequencies
Thesis (BS) — Boston College, 2009
Submitted to: Boston College. College of Arts and Sciences
Discipline: College Honors Program
Discipline: Physics
Marini, Andrea. "Theory of nonlinear and amplified surface plasmon polaritons." Thesis, University of Bath, 2011. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.547873.
Повний текст джерелаHICKERNELL, ROBERT KERR. "NONLINEAR AND MAGNETO-OPTIC EFFECTS ON LONG-RANGE SURFACE PLASMON POLARITONS." Diss., The University of Arizona, 1987. http://hdl.handle.net/10150/184145.
Повний текст джерелаYe, Fan. "Surface plasmon polaritons along metal surfaces with novel structures." Thesis, Boston College, 2014. http://hdl.handle.net/2345/bc-ir:103747.
Повний текст джерелаSurface plasmon polaritons (SPPs) are hybridized quasiparticles of photons and electron density waves. They are confined to propagate along metal-dielectric interfaces, and decay exponentially along the direction perpendicular to the interfaces. In the past two decades, SPPs have drawn intensive attention and undergone rapid development due to their potential for application in a vast range of fields, including but not limited to subwavelength imaging, biochemical/biomedical sensing, enhanced light trapping for solar cells, and plasmonic logic gates. These applications utilize the following intrinsic properties of SPPs: (1) the wavelength of SPPs is shorter (and can be much shorter) than that of free photons with the same frequency; (2) the local electric field intensity associated with SPPs can be orders of magnitude larger than that of free photons; and (3) SPPs are bound to metal surfaces, and are thus easily modulated by the geometry of those surfaces. Here, we present studies on SPPs along metal surfaces with novel structures, including the following: (1) SPP standing waves formed along circular metal surfaces that lead to a "plasmonic halo" effect; (2) directional reflectionless conversion between free photons and SPPs in asymmetric metal-insulator-metal arrays; and (3) broadband absorbance enhancement of embedded metallic nanopatterns in a photovoltaic absorber layer. These works may prove useful for new schemes for SPP generation, plasmon-photon modulation, ultrasensitive dielectric/bio sensing, and high efficiency thin film solar cells
Thesis (PhD) — Boston College, 2014
Submitted to: Boston College. Graduate School of Arts and Sciences
Discipline: Physics
Zimmer, Frank E. "Matter-wave optics of dark-state polaritons applications to interferometry and quantum information /." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=982522533.
Повний текст джерелаAchlan, Moustafa. "Surface Plasmon Polariton and Wave Guide Modes in a Six Layer Thin Film Stack." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS109.
Повний текст джерелаIn this thesis, we investigate the optical properties of a six-layer stack (air-Au-SiO₂-Au-Ti-glass). The interfaces are flat and the modeling is performed using elementary Fresnel expressions at the interface and plane wave propagation in the layers. Two models are used where the sample is: i) excited by a source at infinity (excitation by source at infinity (ESI)); ii) excited by a local source. In the experiments we are modeling this source consists of the inelastic tunneling electrons from a scanning tunneling microscope (STM). In our modeling this source is replaced by a vertical oscillating dipole. Using these two models one calculates the reflected (reflectance) and the transmitted (transmittance) flux from a source at infinity and the transmitted flux of a local source. Surface plasmon polariton (SPP) and wave guide (WG) modes may be identified in the reflectance, transmittance and transmitted flux. In a particular wavelength domain the SPP and WG repel each other giving rise to an avoided crossing. The choice of the gold (Au) and silica (SiO₂) thicknesses of the six-layer stack is guided by two requirements: high amplitude of the observable and wide wavelength dependence of the in-plane wave vector. We also study the influence of the gold and silica thicknesses on the observables. We find that the observables are significant for dAu[10, 90 nm] for the three and dAu[10, 50 nm] for six layer stacks and this predictive study guided the choice of the experimental sample thicknesses. The wave guide mode appears for dSiO₂ >190 nm. The electric field as a function of the penetration coordinate z is calculated in order to characterize the location of the field in the stack and to assign the nature of the modes. We observe that for the SPP the electric field is confined at the Au-air interface whereas, the electric fields corresponding to the WG mode are confined inside SiO₂ layer. Our calculations presented in this work are in good agreement with the experimental measurements performed in our group
Renger, Jan. "Excitation, Interaction, and Scattering of Localized and Propagating Surface Polaritons." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2006. http://nbn-resolving.de/urn:nbn:de:swb:14-1153478195966-65404.
Повний текст джерелаDie Wechselwirkung von elektromagnetischer Strahlung mit subwellenlängenkleinen Teilchen bzw. Oberflächenstrukturen ermöglicht nicht nur eine Miniaturisierung optischer Geräte, sondern erlaubt sehr interessante Anwendungen, beispielsweise in der Sensorik und Nahfeldoptik. In der vorliegenden Arbeit werden die zu Grunde liegenden Effekte im Rahmen der klassischen Elektrodynamik mit Hilfe der semianalytischen Methode der multiplen Multipole (MMP) analysiert, und die Ergebnisse werden mit Experimenten verglichen. Im ersten Teil werden Oberflächenplasmonenresonanzen (engl. surface plasmon resonance - SPR) einzelner und wechselwirkender Metallteilchen untersucht. Die dabei auftretende resonante kollektive Schwingung der freien Elektronen des Partikels bewirkt eine deutliche Erhöhung und Lokalisierung des elektromagnetischen Feldes in seiner Umgebung. Die spektrale Position und die Stärke der SPR eines Nanoteilchens, die von dessen geometrischer Form, Permittivität und Umgebung abhängen, können nur im Grenzfall sehr kleiner Teilchen elektrostatisch beschrieben werden, wohingegen der verwendete semianalytische MMP-Ansatz weitaus flexibler ist und insbesondere auch auf größere Partikel, Teilchen mit komplizierterer Form bzw. Ensembles von Partikeln anwendbar ist. Die betrachteten einzelnen kleinen (< Wellenlänge) Goldkügelchen und Silberellipsoide besitzen eine stark ausgeprägte SPR im sichtbaren optischen Bereich. Diese ist auf eine dipolartige Polarisierung des Teilchens zurückzuführen. Höhere Moden der Polarisation können entweder als Folge von Retardierungseffekten an größeren (mit der Wellenlänge vergleichbaren) Teilchen oder bei der Verwendung inhomogener (z.B. evaneszenter) Wellen angeregt werden. Partikel, die sich in der Nähe eines Substrates befinden, unterliegen der Nahfeldwechselwirkung zwischen den (lichtinduzierten) Oberflächenladungen auf der Oberfläche des Teilchens und des Substrats. Dies führt zu einer Verschiebung der SPR zu niedrigeren Frequenzen und einer Erhöhung des lokalen elektrischen Feldes. Letzteres bildet die Grundlage z.B. der spitzenverstärkten Raman-Spektroskopie und der optischen Nahfeldmikroskopie mit Streulichtdetektion. Dasselbe Prinzip bewirkt ein stark überhöhtes elektrisches Feld zwischen miteinander wechselwirkenden Nanopartikeln, welches z.B. die Sensitivität der oberflächenverstärkten Raman-Mikroskopie um mehrere Größenordnungen steigern kann. Im Gegensatz zur SPR einzelner Nanopartikel kann die Resonanz der Lichtstreuung im Fall eines Partikels in der Nähe eines Substrats aus der durch die Nahfeldwechselwirkung induzierten Anregung elektromagnetischer Oberflächenzustände entstehen. Diese wirken ihrerseits auf das Nanopartikel zurück, wobei eine resonante Lichtstreuung beobachtbar ist. Dieser, am Beispiel einer metallischen Nahfeldsonde über einem Siliziumcarbid-Substrat analysierte, Effekt ermöglicht bei einer ganzen Klasse von polaren Kristallen interessante Anwendungen in der Mikroskopie und Sensorik basierend auf der hohen Dichte von Oberflächenphononpolaritonen dieser Kristalle im mittleren infraroten Spektralbereich und deren nahfeldinduzierten Anregung. Im zweiten Teil der Arbeit werden kollektive Anregungen von Elektronen an Metalloberflächen untersucht. Die dabei auftretenden plasmonischen Oberflächenwellen (engl. surface plasmon polaritons - SPPs) weisen einen exponentiellen Abfall der Intensität senkrecht zur Grenzfläche auf. Diese starke Lokalisierung der Energie an der Oberfläche bildet die Grundlage vieler Anwendungen, z.B. im Bereich der hochempfindlichen Detektion (bio)chemischer Verbindungen oder für eine zweidimensionale Optik (engl. plasmonics). Das Aufheben der Translationsinvarianz längs der Oberfläche ermöglicht die direkte Anregung von SPPs durch ebene Wellen. Die Abhängigkeit dieser Kopplung von der Geometrie wird am Beispiel eines Nanograbens untersucht. Dabei werden neben den SPPs ebenfalls eine oder mehrere Moden im Graben angeregt. Folglich ermöglicht die geeignete Wahl der Grabengeometrie die Optimierung der Umwandlung von ebenen Wellen in SPPs. Im - in der Praxis weit verbreiteten - Fall asymmetrisch eingebetteter metallischer Dünnschichtwellenleiter existieren zwei Moden. In Abhängigkeit von der Grabenbreite kann die eine oder die andere Mode bevorzugt angeregt werden. Die Analyse der Wechselwirkung von SPPs mit Oberflächenstrukturen, z.B. Kanten, Stufen, Barrieren und Gräben, zeigt die Möglichkeit der Steuerung der Reflexions-, Transmissions- und Abstrahleigenschaften durch die gezielte Wahl der Geometrie der "Oberflächendefekte" auf der Nanoskala und deckt die zu Grunde liegenden Mechanismen und die daraus resultierenden Anforderungen bei der Herstellung neuer plasmonischer Komponenten auf. Exemplarisch wird das Prinzip der SPP-Anregung an einzelnen und mehreren Gräben in dünnen metallischen Filmen sowie der subwellenlängen Feldlokalisierung an sich verjüngenden metallischen Dünnschichtwellenleitern unter Verwendung der optischen Nahfeldmikroskopie experimentell gezeigt
Buller, Jakov. "Structure and Dynamics of Microcavity Exciton-Polaritons in Acoustic Square Lattices." Doctoral thesis, Humboldt-Universität zu Berlin, 2018. http://dx.doi.org/10.18452/19328.
Повний текст джерелаMicrocavity (MC) exciton-polaritons can form condensates, i.e. macroscopic quantum states (MQSs), as well under a periodic potential modulation. The modulation by a surface acoustic wave (SAW) provides a powerful tool for the formation of tunable lattices of MQSs in semiconductor MC. In this work, fundamental aspects of the structure and dynamics of exciton-polariton condensate in acoustic square lattices were investigated by probing its wavefunction in real- and momentum space using spectral- and time-resolved studies. The MQSs were resonantly excited in an optical parametric oscillator configuration. The tomographic study revealed that the exciton-polariton condensate structure self-organises in a concentric structure, which consists of a single, two-dimensional gap soliton (2D GS) surrounded by one-dimensional MQSs and an incoherent background. 2D GS size tends to saturate with increasing particle density. The experimental results are supported by a theoretical model based on the variational solution of the Gross-Pitaevskii equation. Time-resolved studies showed the evolution of the 2D GS wavefunction at the acoustic velocity. Interestingly, the photoluminescence (PL) intensity emitted by the 2D GS as well as its coherence length oscillate with time. The PL oscillation amplitude depends on the intensity and the size of the exciting laser spot, and increases considerably for excitation intensities close to the optical threshold power for the formation of the MQS. In the outlook, the formation of Tamm-Plasmon/Exciton-Polariton (TPEP) hybrid states and their modulation by SAWs was theoretically discussed. Here, the upper DBR is partly replaced by a thin metal layer placed on top of the MC. In this case, TPEP form by the superposition of Tamm plasmons at the metal-semiconductor interface and the exciton-polaritons in the MC.
Wu, Yunhui. "Experimental Investigation of Size Effects on Surface Phonon Polaritons and Phonon Transport." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLC012/document.
Повний текст джерелаThermal conduction becomes less efficient as structures scale down into submicron sizes since phonon-boundary scattering becomes predominant and impede phonons more efficiently than Umklapp scattering. Recent studies indicated that the surface phonon polaritons (SPhPs), which are the evanescent electromagnetic waves generated by the hybridation of the optical phonons and the photons and propagating at the surface of a polar dielectric material surface, potentially serve as novel heat carriers to enhance the thermal performance in micro- and nanoscale devices. We study the condition of SPhPs existing in a dielectric submicron film with a broad frequency range. The calculaton of SPhPs thermal conductivity based on Boltzmann transport equation (BTE) demonstrates that the heat flux carried by SPhPs exceeds the one carried by phonons. We also conduct a time-domain-thermal-reflectance (TDTR) measurement of $SiN$ submicron films and demonstrate that the thermal conductivity due to the SPhPs at high temperatures increases by decreasing the film thickness. The results presented in this thesis have potential applications in the field of heat transfer, thermal management, near-field radiation and polaritonics
Mallet, Emilien. "Etude des propriétés polaritoniques de ZnO et GaN. Application à l'étude de l'effet laser à polaritons dans une microcavité." Thesis, Clermont-Ferrand 2, 2014. http://www.theses.fr/2014CLF22482/document.
Повний текст джерелаThis manuscript is devoted to the physics of polaritons in two wide band gap semiconductor : ZnO and GaN. The polaritonic parameters of these materials have been accurately determined through a study which combines linear and non-linear spectroscopies (continuous reflectivity, autocorrelation, photoluminescence and degenerate four-wave mixing). The interpretation of these results lead to a better understanding of the interaction processes in the semiconductor : the important role played by the polariton-LO phonon interactions in the polaritonic damping is highlighted and particularly for ZnO. This preliminary work on bulk samples is essential for a suitable study of polariton lasing in microcavities like it is presented in the second part of this manuscript. For this study, two similar microcavities, one based on ZnO and another on GaN. The photonic properties of these structures are at the state of the art : they have a good quality factor (Q ≈ 1,000) and have a low photon disorder. The strong coupling regime and the polariton lasing are observed to room temperature. Finally, the establishment of phase diagrams allows to highlight the important role of LO phonons in reduction of the laser threshold
Ung, Bora. "Study of the interaction of surface waves with a metallic nano-slit via the finite-difference time-domain method." Master's thesis, Québec : Université Laval, 2007. http://www.theses.ulaval.ca/2007/24879/24879.pdf.
Повний текст джерелаGluchko, Sergei. "Manipulation d’énergie thermique avec des ondes de surface électromagnétique aux échelles micro- et anoscopiques." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLC075/document.
Повний текст джерелаSurface phonon-polaritons (SPhPs) are evanescent electromagnetic surface waves generated by the phononphoton coupling and that propagate along the interface of a polar medium (such as SiO2 and SiC) and a dielectric one. In this work, we investigate possible applications of SPhPs for enhancing the thermal performance of micro- and nanoscale devices, focusing of thermal energy with micro-structures, decreasing the diffraction angles of infrared radiation on subwavelength apertures, and demonstrating broadband coherent thermal emission. We also perform infrared spectroscopy microscopy measurements of microscale objects and demonstrate long-range thermally excited surface modes in a broad frequency range. The results presented in this thesis can have possible applications in fields related to heat transfer, infrared optics, near-field thermal radiation, infrared microscopy, and polaritonics
Safari, Akbar. "Resonant Light-Matter Interaction for Enhanced Control of Exotic Propagation of Light." Thesis, Université d'Ottawa / University of Ottawa, 2019. http://hdl.handle.net/10393/39057.
Повний текст джерелаArchambault, Alexandre. "Optique des ondes de surface : super-résolution et interaction matière-rayonnement." Phd thesis, Université Paris Sud - Paris XI, 2011. http://tel.archives-ouvertes.fr/tel-00678073.
Повний текст джерелаLarré, Pierre-Élie. "Fluctuations quantiques et effets non-linéaires dans les condensats de Bose-Einstein : des ondes de choc dispersives au rayonnement de Hawking acoustique." Phd thesis, Université Paris Sud - Paris XI, 2013. http://tel.archives-ouvertes.fr/tel-00875349.
Повний текст джерелаRuan, Zhichao. "Dispersion Engineering : Negative Refraction and Designed Surface Plasmons in Periodic Structures." Doctoral thesis, Stockholm : Informations- och kommunikationsteknik, Kungliga Tekniska högskolan, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4542.
Повний текст джерелаArbabi, Amir. "Terahertz Surface Plasmon Polariton-like Surface Waves for Sensing Applications." Thesis, 2009. http://hdl.handle.net/10012/4524.
Повний текст джерела"Intensity focusing and guided wave nanophotonic devices using surface plasmon polaritons." 2012. http://library.cuhk.edu.hk/record=b5549522.
Повний текст джерела有鑒於上述種種問題,本論文集中于總結構和材料兩方面剪裁表面電漿以期達到下面的要點和目的:
(1)基於傳播電漿(PSPs) ,或者傳播電漿同局域電漿(LPRs) 的結合而發展新的簡單的器件,由此提供顯著的聚焦、電磁場和場強增強。這種器件可以應用於很多方面,包括依賴強場的生物分子傳感探測,以及非線性光學效應。
(2) 設計基於增益介臂的低損耗的納米光子學器件,這種器件能夠為納米光子器件提供切實的可行性。針對表面電漿共振和電漿結構植于的介電環境之間聯繫,獲得其理論闡釋。這一工作將可以為傳感和器件設計提供深入的理解。
本論文中我們已經得到了如下的成果:
(1)一種基於將表面電漿聚焦到金屬盤中心孔而實現級聯放大增強的SERS 激勵源被提出和理論研究。這種器件提供了準均勻,水平偏振,較大面積的強SERS 激勵源。如時域有限差分(FDTD) 方法所揭試,強度譜線和波長範圍在650-1000 nm的近場性質展混出了一系列增強模式。在最佳的增強模式下,孔洞中的電場可以使得SERS 信號獲得四次方的進一步增強。同時一種解析模型也被提出來給FDTD結果以精確的解釋。我們的模型同時揭示了通過侵化金屬盤尺度而得到八次方場增強的可能性。我們的結果表明極強的電場增強,並且聚焦的電場是平行于金屬盤平面的效果,只能在中間包含一個孔洞的中空金屬盤(HMDs) 中才可能實現。這是因為金屬盤中間絶悸的問時的存在使得孔洞邊棒的電子不能流通間隙,進進而使得高強度的電場可以存在。另一方面,在實心的金屬盤的情形下,電子流會傾向於抑制到達中心的表面電漿的強度。除了產生高度優化的SERS 熱點,這種大面積的活性孔洞在螢光增強和非線性光學中也提供了一些潛在的應用。
除了中空金屬盤,基於經由增孟輔助下PSPs 的LPRs 之間的衍射共掠,我們開發了另一種一種高度侵化的熱點。由此得到的器件被理論上分析。衍射共振的過程是經由下述過程實現的:由LPRs 實現的光場局域化, LPRs 和PSPs 相互作用,以及通過PSPs 的能量傳遞。我們的研究表明通過給PSPs 引入光學增孟,可以從一種激光過程中的到LPRs 非常強的電磁場增強。我們發現通過現實的增豆豆水平,局域電場的增強引子可以達到10⁷。因此,我們為實現依賴強電場的單分子SERS提供了一種理想的方案,並且這種方案也是一種納米激光的新機制。
(2) 基於增孟輔助的電漿共振金屬納米顆粒鏈,我們提出了一種低損耗納米尺度的波導。我們證明通過引入增孟材料或者引入適當的介電材料作為周圍環境,波導的損耗可以顯著減小。為了得到低損耗傳翰的復介電譜,我們開發了一種高效的膺正交基展開(POBE) 方法。本徵模式分析揭示了低損耗模式的物理源頭,同時給出了除了基於單體偶極共振傳輸之外能量傳輸的可能性。我們提出一種基於電子書刻蝕和化學合成納米顆粒的一種製備方案。這種電漿波導可以構成納米光學器件的基石,尤其是用於集成納米光子學線路。同時,我們原創的揭示表面電漿的物理機理的POBE 方法可以用於進一步研究優化增豆豆輔助的電漿結構,進而設計良好的納米光子器件。
本論文始於一個古老問題:宏觀尺度下基於傳統介電材料光聚焦和傳導,并最後終結於納米尺度內經由增益材料和電漿結構的表面電漿的聚焦、和引導。論文結尾,本文給出了展望以及幾種可能的器件實現方案。
Surface plasmons (SPs) are electromagnetic waves that propagate along the surface of a noble metal via fluctuations in electron density. In the last decade, SPs effects gained widespread attention for their potential application in photonic devices, sensing, surface-enhanced fluorescence, especially Surface-Enhanced Raman Scattering (SERS). Many published results have confirmed the expected strengths of SERS, hence making it possible for SERS to become a next generation ultra-sensitive biosensing platform, which may take the form of various nano-structures in order to achieve optimized hot spots. While the wavelength of SPs is closely related to material dielectric properties and has limited scope for further reduction, it is of critical importance to ensure that SPs are being generated with the highest intensity before any further application advancement is possible. Meanwhile, plasmonics has aroused longstanding interests among researchers to realize nanophotonic devices. For example, ordered arrays of closely spaced metallic nanoparticles (MNP) have been employed to transport optical signals via near-field coupling below the diffraction limit. However, radiation and absorption losses in these waveguides can be serious. New concepts for novel plasmonic devices are essential.
In light of these issues, this thesis focuses on tailoring SPs from the viewpoints of structural and material properties with the following objectives:
(1) To develop a new class of simple plasmonic devices based on tailoring of propagating surface plasmons (PSPs) or cooperation between PSPs and localized plasmon resonance (LPRs) to offer significant field focusing and intensity enhancement. It can serve a wide range of applications, including high field related biomolecular sensing and detection as well as non-linear optical effects.
(2) To design low loss nanophotonic wave guides based on gain medium, which may offer real opportunity for practical nanophotonic devices. To obtain a theoretical interpretation of relationship between surface plasmon resonance and host environment where the plasmonic structure embedded. This study should provide further insight towards sensing and device design.
We have achieved the following results in this project:
(1) A novel SERS excitation source based on focusing of surface plasmons around the center hole of a metal disk for cascaded enhancement is put forward and studied theoretically. The device offers intense SERS excitation with quasi-uniformity and horizontal polarization over a comparatively large hole. As revealed by fmite-difference time-domain (FDTD) method, the intensity spectra and the characteristics of the near field for the wavelength range of 650-1 000 nm exhibit a number of enhancement modes. Electric field intensity of the optimal mode enhances the SERS signal inside the hole by over four orders. An analytical model was also developed to gain precise interpretation on FDTD results. Our model also reveals the possibility of achieving eight orders of enhancement by optimizing the scale of the disk. Our results indicate that much higher electric field enhancement in hollow metal disks (HMDs) can only be possible when we have a hole at the centre and the direction of the focusing field is parallel to the surface of the plasmonic device. This is because of the presence of an insulating gap at the center, that higher level of electric field can exist as electrons are not allowed to flow pass the gap. On the other hand, in the case of a solid metal disk, the flow of mobile electron will tend to dampen the amplitude of the arriving SPs. In addition to generation of highly optimized hot spots for SERS, the large active hole also offers potential applications in fluorescence enhancement and nonlinear spectroscopy.
In addition to HMDs, we also develop a kind of highly optimized hot spots based on diffraction coupling between LPRs via gain-assisted PSPs. Thus derived device was theoretically analyzed. The process of diffraction coupling is achieved via localization of light by LPRs, LPRs-PSPs interplay and PSPs transfer. Our study shows that by incorporating optical gain to PSPs, a very strong boost of the electromagnetic enhancement of LPRs can be expected from a lasing process. We find that with a practical gain level, the enhancement factor of local electric field intensity can be larger than 10⁷. Hence, we offer an ideal configuration to realize high-field dependent single molecule SERS and also a newly applied physical scheme for nano-Iaser.
(2) We propose a low-loss nanoscale wave guide based on gain-assisted plasmonic resonance MNP chain. We demonstrate that by employing a gain material or even an appropriate dielectric for the host environment, waveguide loss can be reduced dramatically. A highly efficient pseudo-orthonormal basis expansion (POBE) method for obtaining the complex dielectric spectra of the low-loss transmission has been developed. Eigenmode analysis revealed the physical origin of those low-loss wave guiding modes, which opens the possibility to achieve waveguiding other than using conventional dipolar resonances of individual particles. A scheme based on electron beam lithography and chemically synthesized nanoparticles has been proposed to fabricate the device. Such plasmonic waveguides may serve as building blocks for making nanoscale optical devices especially for integrated nanophotonic circuits. Meanwhile, the originally developed POBE method, which reveals the general physical mechanism of SPs, can be used to further explore optimized gain-assisted plasmonic structures to design favorable nanophotonic devices.
This thesis begins with an old problem: light focusing and guiding in macroscopic scale with traditional dielectric, and sum up finally with SPs focusing and guiding in nanoscale with gain material and plasmonic material. An outlook is presented at last with several potential schemes for the device realization.
Detailed summary in vernacular field only.
Detailed summary in vernacular field only.
Detailed summary in vernacular field only.
Detailed summary in vernacular field only.
Detailed summary in vernacular field only.
Detailed summary in vernacular field only.
Detailed summary in vernacular field only.
Detailed summary in vernacular field only.
Detailed summary in vernacular field only.
Zhang, Haixi.
"September 2011."
Thesis (Ph.D.)--Chinese University of Hong Kong, 2012.
Includes bibliographical references (leaves 124-139).
Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web.
Abstract also in Chinese.
Chapter Chapter1 --- Introduction --- p.1
Chapter 1.1 --- Towards field intensity focusing and guiding of electromagnetic wave --- p.1
Chapter 1.2 --- Surface plasmons as a route to realize electromagnetic field focusing and waveguiding in nanoscale --- p.3
Chapter 1.3 --- Structure of this thesis --- p.10
Chapter Chapter2 --- Plasmonic near field engineering: structural and material aspects --- p.13
Chapter 2.1 --- Light focusing using near field oflocalized plasmon resonances --- p.13
Chapter 2.2 --- Plasmonic near field focusing through propagating surface plasmons --- p.30
Chapter 2.3 --- Various schemes for near field focusing through surface plasmons --- p.33
Chapter 2.4 --- Guiding surface plasmons in nanoscale --- p.35
Chapter 2.5 --- Gain-assisted surface plasmons: a different path to field enhancement and guiding --- p.38
Chapter Chapter3 --- Surface plasmons: characteristics and methodology --- p.42
Chapter 3.1 --- Characteristics of localized plasmon resonance --- p.42
Chapter 3.2 --- Localized plasmon resonance: Mie theory and its variations --- p.44
Chapter 3.3 --- Characteristics of propagating surface plasmons --- p.49
Chapter 3.4 --- Reflection Pole Method for studying propagating surface plasmons in multilayer structures --- p.55
Chapter 3.5 --- Pseudo-orthonormal basis expansion method: a new mathematical scheme for modeling surface plasmons --- p.58
Chapter Chapter4 --- High field generation through intensity focusing of propagating surface plasmons --- p.62
Chapter 4.1 --- Introduction --- p.62
Chapter 4.2 --- The hollow metal disk design and its characteristics --- p.64
Chapter 4.3 --- Quasi-uniform excitation source based on focusing of propagating surface plasmons for cascade enhancement of surface enhanced Raman scattering --- p.68
Chapter 4.4 --- Conclusions and outlook --- p.78
Chapter Chapter5 --- High field generation through intensity enhancement of localized plasmon resonance from gain-assisted diffraction coupling --- p.81
Chapter 5.1 --- Introduction --- p.81
Chapter 5.2 --- Diffraction excitation of localized plasmon resonance from propagating surface plasmons --- p.83
Chapter 5.3 --- Diffraction coupling of localized plasmon resonance through gain-assisted propagating surface plasmons --- p.89
Chapter Chapter6 --- Gain-assisted plasmonic waveguides based on nanoparticle chains: an effective device approach for achieving low loss in nanoscale dimensions --- p.97
Chapter 6.1 --- Introduction --- p.97
Chapter 6.2 --- Theoretical study of near-field particle interactions in active plasmon wave guides --- p.99
Chapter 6.3 --- Routing and splitting of electromagnetic energy in nanosphere plasmon waveguides --- p.103
Chapter 6.4 --- Conclusions --- p.107
Chapter Chapter7 --- Conclusions and outlook --- p.109
Appendix --- p.117
Bibliography --- p.124
Yen, Yin-Jui, and 顏吟叡. "The mode analysis of surface plasmon polariton wave between metal and anisotropic medium interface." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/72497037155847744905.
Повний текст джерела國立中山大學
光電工程學系研究所
103
Surface plasmon mode is an eigenmode on the interface between the metal and the dielectric, it’s the two-dimensional plane wave, the usual surface plasmon dispersion relation on the dielectric/metal is k_spp=k_0*√(ε_o*ε_e/(ε_e+ε_o )) , the formula is derivative from the Maxwell’s equations and boundary conditions. In the anisotropic material, such as the uniaxial liquid crystal, we can get an complicated surface in the K-space by substituting the relative permittivity from different axial into the Maxwell’s equations, moreover, the dispersion relative curve is more complicated for the surface plasmon problem on the uniaxial crystal/metal interface. This aim of this paper is to amend the dispersion relation which is mentioned above by using the permittivity tensor、K space equations and the electromagnetic field boundary condition. That can be expressed as an analytical solution which optical axis is in the same plane with the wave vector of surface plasmon and the normal line of the interface k_spp=k_0*√((ɛ_m(ɛ_m (ɛ_e*sin^2(θ)+ɛ_o*cos^2(θ))-ɛ_e*ɛ_o))/(ɛ_m^2-&;quot; &;quot; ɛ_e*ɛ_o )) or a numerical solution which optical axis rotate in other directions for the uniaxial crystals. Furthermore, we derives the dispersion relation of three layer structure(LC/Au/glass) and verify the previous results that the calculating reflectivity of Kretschmann structure is corresponded with the experiment.
Zimmer, Frank E. [Verfasser]. "Matter-wave optics of dark-state polaritons : applications to interferometry and quantum information / Frank E. Zimmer." 2006. http://d-nb.info/982522533/34.
Повний текст джерелаHsu, Chan-Jung, and 許展榮. "Using the Symbiotic Property between Mechanical and Electromagnetic Wave in Piezoelectric Superlattice Polaritons to Develop FM Antenna." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/42nd67.
Повний текст джерела國立臺灣大學
機械工程學研究所
106
Nowadays there are many ways to miniaturize the antenna, but basically still can not escape the metal antenna size restrictions. In this research, we use different antenna material which had never be tried before to achieve to miniaturize the antenna. Through the characteristics of the piezoelectric with the periodic changes in structure causes the mutual effect between the electromagnetic governing equation and Newton''s second law of motion to interact with each other to make it strongly couple electromagnetic waves and mechanical waves in the piezoelectric material to become symbiotic state. In this state the electromagnetic property of polariton can be excited by electromagnetic signal in the air and relative small wavelength of mechanical wave make antenna miniaturization possible. Since the poles of the periodically poled piezoelectric crystal have the properties of receiving and radiating electromagnetic waves, using charge integral method to fabricate the periodically poled lithium niobate superlattice for 107.7 MHz, and electrodes arranged in a specific direction thereon are formed as micro antennas , the measurement of this antenna to receive electromagnetic waves and the ability to compare with the metal antenna, the results found that the two received the same results, but the size of lithium niobate crystal is less than one third of the length of the wire. Antenna miniaturization of the effect is very significant, its future development worthy of in-depth discussion. Applying PPLN to the radio can be found when we use of the same classical music, SNR value of PPLN as a receiver is 3.078dB higher than when not using PPLN. It has the ability to receive electromagnetic energy and in practical applications is quite feasible. The final comparison receive the real radio station singal between the metal antenna and PPLN. When receiving the broadcast singal, SNR value of the metal antenna is 6.908 dB and is 6.887 dB. The small difference between the two values proves that PPLN is not only the successful miniaturization of the antenna but also the potential of commercialization.
游竟維, Ching-Wei Yu, and 游竟維. "Negative Refractive Index, Negative Refraction and Long-Range Surface-Plasmon-Polariton Wave in Nano-Scale Silver Films." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/4446th.
Повний текст джерела國立臺北科技大學
光電工程系研究所
98
In this work, negative refractive index, negative refraction and long-range surface-plasmon-polariton (LRSP) propagation in nano-scale silver films were analyzed and investigated. Silver films with negative refractive index were fabricated and demonstrated in the visible regime. First, we use the normalized admittance diagram (NAD) analysis to design the prism-coupling system {prism/ equivalent coupling layer(ECL) /silver film(20nm) /equivalent substrate(ES)} for LRSP propagation in two-dimensional nanostructure of silver. The excitation of LSPP waves is characterized as a huge open loop of the NAD of the metal film at a designated angle of incidence. We propose three kinds of ECLs to complete the multilayer LSPP design: the intrinsic admittances of the ECLs are (i) real , (ii) infinite, and (iii) imaginary. Periodic symmetrical film stacks are used as the ECL to achieve the coupling effects. In addition, the multilayer structure for exciting s- and p-polarized LRSP propagation simultaneously is designed at the wavelength of 632.8 nm. Negative refraction in three-dimensional nanostructures of silver is interpreted and analyzed using the complex ray tracing method. When the p-polarized incident light is incident on the {dielectric medium/uniaxial absorbent material(with complex-valued three principal indices)} interface, the effective refractive index experienced by the p-polarized light and the complex-valued wave vector of the refracted light still satisfy the Fresnel equation. Therefore, we can calculate the refracted angles of the wave vector and Poynting vector and analyze the conditions of the negative refraction in silver nanowires. Negative refraction of the Poynting vector and backward wave phenomenon in the silver nanowires are interpreted and presented at the wavelengths of 365 nm and 633 nm. Several three-dimensional nanostructures of silver, such as nanorod arrays (NRA), zigzag and S-shaped structures, are deposited using glancing angle deposition (GLAD) technology. The equivalent transmission and reflection coefficients of the films are measured by walk-off and polarization interferometers in the visible regime. The retrieval method is used to recover the equivalent relative permeabilities , permittivities , admittance z, and refractive indices n of the films for p and s polarizations. We demonstrate that and satisfies the inequality and the real parts of n for p-polarized incident light are negative at the wavelengths of 532 nm, 639, and 690 nm. In addition, the zigzag structures with different shapes are fabricated using bideposition technique. We use the finite-difference time-domain (FDTD) method to simulate the magnetic reversed field in a single zigzag structure. The shape effect on the real parts of the equivalent permeabilities for zigzag structures is investigated.
Dai, Wen-Hua, and 戴文華. "Investigation on The Generation of Surface Plasmon Polaritons: Numerical Analysis via Four-Wave Mixing and Far-field Optical Measurement of Two-wire Transmission Line." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/uh8zx4.
Повний текст джерела國立清華大學
光電工程研究所
102
In this work, we excite SPP by four-wave mixing (FWM) and find the optimum angle of incidence using finite-difference time domain method. Besides, we propose and design mode converters in a plasmonic nanocircuit by controlling the phase of surface plasmon polaritons on two-wire transmission lines (TWTLs) with the length difference between the two wires. Our samples are fabricated by focused ion beam milling of a gold flake deposited on a cover glass. In the experimental process, we use our home-made confocal microscope focusing the spot at the end of TWTL and CCD camera is used to observe the emission spot. Finally, we can observe the excitation spots are sufficiently displaced from the mode detector. The mode conversion transforms successfully between transverse electric(TE) mode and transverse magnetic(TM) mode by the length difference between the two wires.
Jarvis, Thomas William. "Novel tools for ultrafast spectroscopy." Thesis, 2011. http://hdl.handle.net/2152/ETD-UT-2011-12-4456.
Повний текст джерелаtext
Zhen, Yurong. "Plasmonic properties and applications of metallic nanostructures." Thesis, 2013. http://hdl.handle.net/1911/72071.
Повний текст джерела