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Dissertations / Theses on the topic 'Whispering gallery modes (WGMs)'

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Published: 25 May 2024

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1

Jana, Subha. "Biodetection using fluorescence energy transfer from Quantum dot excited whispering gallery modes to fluorescent acceptors." Electronic Thesis or Diss., Université Paris sciences et lettres, 2021. http://www.theses.fr/2021UPSLS081.

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La quantification de biomarqueurs spécifiques est un outil de diagnostic important. Les tests immunologiques standards tels que ELISA nécessitent de nombreuses étapes de lavage et une amplification du signal, en particulier à faible concentration. D'autre part, le transfert d'énergie résonant de type Förster (FRET) a été utilisé pour concevoir des tests biologiques homogènes en une seule étape qui ne nécessitent aucune étape de lavage, où le biomarqueur permet la formation d'un complexe "sandwich" impliquant des anticorps marqués par le donneur et d'autres marqués par l'accepteur. Le FRET du d
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2

Shah, Suhani Kiran. "Modeling scattered intensity from microspheres in evanescent field." Thesis, [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-2021.

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3

Yue, HongQuan. "Optical whispering gallery modes in chalcogenide As2Se3 microspheres." Thesis, McGill University, 2011. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=104591.

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Anisotropic chalcogenide microsphere is introduced for coupling theoretical analyzing and coupling experiment. Whispering Gallery Modes (WGMs) of isotropic microsphere is introduced and the TE & TM WGMs dispersion relationship is derived from electromagnetic vector equations in the spherical coordinate. The Maxwell equations can be solved in 2D model for the 3D model of axisymmetric or Rotational symmetry isotropic microsphere. First 4 TE&TM WGMs are simulated in 2D model using finite-element weak method. The binding capability, mode volume V and quality factor Q depend on the refractive index
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4

Foster, David H. "Fabry-Perot and Whispering Gallery Modes In Realistic Resonator Models." Thesis, view abstract or download file of text, 2006. http://wwwlib.umi.com/cr/uoregon/fullcit?p3211216.

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Thesis (Ph. D.)--University of Oregon, 2006.<br>Typescript. Includes vita and abstract. Includes bibliographical references (leaves 204-213). Also available for download via the World Wide Web; free to University of Oregon users.
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5

Dinyari, Khodadad. "Coupling Nitrogen Vacancy Centers in Diamond Nanopillars Whispering Gallery Microresonators." Thesis, University of Oregon, 2013. http://hdl.handle.net/1794/12962.

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For cavity quantum electrodynamics systems (cavity-QED) to play a role in quantum information processing applications and in quantum networks, they must be robust and scalable in addition to having a suitable method for the generation, processing and storage of quantum bits. One solution is to develop a composite system that couples a nitrogen vacancy (NV) center in diamond to a whispering gallery mode supported by a fused silica microsphere. Such a system is motivated by the optical and electron-spin properties of the NV center. The NV center is the leading spin-qubit and exhibits atomic l
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6

Pang, Shuo. "Whispering gallery modes in quantum dot-embedded dielectric microspheres for tagless remote refractometric sensing." Texas A&M University, 2008. http://hdl.handle.net/1969.1/85998.

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This thesis presents the development of a refractometric sensor based on quantum dot-embedded polystyrene microspheres. The technique uses optical resonances within a microsphere, known as Whispering-Gallery Modes (WGMs), which produce narrow spectral peaks. The basic theory of WGMs is reviewed and specifically discussed for biosensing application. The spectral shifts of WGM peaks are sensitive to changes in the local refractive index. In the experiments, two-photon excited luminescence from the quantum dots couples into several WGMs within the microresonator. By optimizing the detection area,
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7

Fraser, Michael John. "Optical Fiber Microstructures for Self-Contained Whispering Gallery Mode Excitation." Diss., Virginia Tech, 2016. http://hdl.handle.net/10919/73659.

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Optical resonators, which confine light by resonant recirculation, serve as the basis for a wide variety of optical components. Though they appear in many geometric forms, the most effective of optical resonators show axial symmetry in at least one dimension. A popular variation that finds broad application is the dielectric sphere. Acclaimed for their high quality (Q) factor and small modal volume, spheres owe credit of these attractive features to their support of whispering gallery mode (WGM) resonances. The sensitivity of a resonance's frequency and Q to strain, temperature, and other para
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8

Auxemery, Philippe. "Contribution à l'étude des paramètres électriques et électromagnétiques des modes de galerie des résonateurs diélectriques." Limoges, 1989. http://www.theses.fr/1989LIMO4001.

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Deux méthodes d'analyses électromagnétiques des Whispering Gallery (W. G) modes des R. D. Sont présentées dans ce mémoire. Une méthode approximative analytique et la méthode des éléments finis permettent de connaître avec précision la fréquence de fonctionnement et la cartographie du champ électromagnétique d'une structure microonde. Ces résultats couplés à une analyse électrique des dispositifs à résonateurs diélectriques ont permis la réalisation de filtres directifs et d'un combineur de puissance utilisant les W. G. Modes des résonateurs diélectriques.
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9

Klusmann, Carolin [Verfasser], and H. [Akademischer Betreuer] Kalt. "Hybrid Photonic–Plasmonic Modes in Coated Whispering-Gallery Resonators / Carolin Klusmann ; Betreuer: H. Kalt." Karlsruhe : KIT-Bibliothek, 2019. http://d-nb.info/1191267466/34.

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10

Cros, Dominique. "Les whispering gallery modes des resonateurs dielectriques : application aux oscillateurs et combineurs de puissance millimetriques." Limoges, 1990. http://www.theses.fr/1990LIMO0108.

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L'objectif de ce travail a ete l'analyse, la conception, la realisation et le test d'oscillateurs et de combineurs de puissance pouvant fonctionner dans la bande millimetrique 90-100 ghz. L'absence d'analyseur de reseau dans cette bande de frequence, nous a tout d'abord conduit a la mise au point d'un banc de mesure manuel des caracteristiques des dispositifs millimetriques. Puis, les oscillateurs et les combineurs de puissance etant constitues par l'association d'un circuit actif et d'un circuit passif, nous nous sommes plus particulierement interesses a l'analyse de ces derniers. C'est ainsi
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11

Tomazio, Nathália Beretta. "Fabricação de micro-ressonadores ópticos via fotopolimerização por absorção de dois fótons." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/76/76132/tde-14042016-140022/.

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Os micro-ressonadores que suportam whispering gallery modes têm atraído a atenção da comunidade científica devido a sua grande capacidade de confinar a luz, propriedade que faz dessas estruturas plataformas ideais para o desenvolvimento de pesquisa fundamental como interação da radiação com a matéria e óptica não linear. Além disso, suas características como operação em frequências do visível e de telecomunicações, facilidade de integração e alta sensitividade os tornam extremamente flexíveis para aplicações que vão desde filtros ópticos até sensores. Neste trabalho, demonstramos a fabricação
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Özel, Bilal [Verfasser], Gustav [Gutachter] Schweiger, and Cemal [Gutachter] Esen. "Entwicklung eines faseroptischen Temperatursensors auf der Basis von Whispering Gallery Modes / Bilal Özel ; Gutachter: Gustav Schweiger, Cemal Esen." Bochum : Ruhr-Universität Bochum, 2017. http://d-nb.info/1137379987/34.

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13

Jager, Jean-Baptiste. "Fabrication et étude optique de microcavités à modes de galerie intégrées sur silicium." Thesis, Grenoble, 2012. http://www.theses.fr/2012GRENY017/document.

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Ce travail de thèse a consisté à mettre en place toute une filière de fabrication de microtores en silice sur silicium (étapes de lithographie et de gravure en salle blanche pour la réalisation de microdisques, installation d'un banc optique permettant la transformation du résonateur en microtore par un procédé de recuit laser CO2), à installer un banc optique permettant de mesurer la largeur spectrale de leurs résonances optiques à 1.55 µm et enfin, à explorer l'intégration d'émetteurs de lumière composés d'éléments de la colonne IV comme du silicium et du germanium, dans ces cavités. Des mic
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Hon, Kam Yan. "Surface plasmon resonance-assisted coupling to whispering-gallery modes in micropillar resonators and silicon microdisk-based depletion-type modulators using integrated schottky diodes /." View abstract or full-text, 2007. http://library.ust.hk/cgi/db/thesis.pl?ECED%202007%20HON.

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15

ARMAROLI, Andrea. "Modelling and Characterization of Guiding Micro-structured Devices for Integrated Optics." Doctoral thesis, Università degli studi di Ferrara, 2008. http://hdl.handle.net/11392/2389240.

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In this thesis we show several modelling tools which are used to study nonlinear photonic band-gap structures and microcavities. First of all a nonlinear CMT and BPM were implemented to test the propagation of spatial solitons in a periodic device, composed by an array of parallel straight waveguides. In addition to noteworthy theoretical considerations, active functionalities are possible by exploiting these nonlinear regimes. Another algorithm was developed for the three-dimensional modelling of photonic cavities with cylindrical symmetry, such as microdisks. This method is validated b
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16

Anstie, James D. "A 50 K dual-mode sapphire oscillator and whispering spherical mode oscillators." University of Western Australia. School of Physics, 2007. http://theses.library.uwa.edu.au/adt-WU2007.0070.

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[Truncated abstract] This thesis is split into two parts. In part one; A 50 K dual mode oscillator, the aim of the project was to build a 50 K precision oscillator with frequency stability on the order of 1014 from 1 to 100 seconds. A dual-mode temperature compensation technique was used that relied on a turning point in the frequency-temperature relationship of the difference frequency between two orthogonal whispering gallery modes in a single sapphire crystal. A cylindrical sapphire loaded copper cavity resonator was designed, modelled and built with a turning point in the difference freque
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17

Gorkowski, Kyle J. "The Morphology and Equilibration of Levitated Secondary Organic Particles Under Controlled Conditions." Research Showcase @ CMU, 2017. http://repository.cmu.edu/dissertations/1067.

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I advanced the understanding of particle morphology and its implications for the behavior and effects of atmospheric aerosol particles. I have developed new experimental methods for the Aerosol Optical Tweezers (AOT) system and expanded the AOT’s application into studying realistic secondary organic aerosol (SOA) particle phases. The AOT is a highly accurate system developed to study individual particles in real-time for prolonged periods of time. While previous AOT studies have focused on binary or ternary chemical systems, I have investigated complex SOA, and how they interact with other che
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18

Park, Young-Shin 1972. "Radiation pressure cooling of a silica optomechanical resonator." Thesis, University of Oregon, 2009. http://hdl.handle.net/1794/10559.

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xi, 125 p. : ill. (some col.) A print copy of this thesis is available through the UO Libraries. Search the library catalog for the location and call number.<br>This dissertation presents experimental and theoretical studies of radiation pressure cooling in silica optomechanical microresonators where whispering gallery modes (WGMs) are coupled to thermal mechanical vibrations. In an optomechanical system, circulating optical fields couple to mechanical vibrations via radiation pressure, inducing Stokes and anti-Stokes scattering of photons. In analogy to laser cooling of trapped ions, the mec
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19

Mialichi, José Roberto. "Ressonadores de microdiscos com região ativa nanoestruturada bombeados por injeção eletrônica." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/278523.

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Orientador: Newton Cesário Frateschi<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Física Gleb Wataghin<br>Made available in DSpace on 2018-08-17T02:03:42Z (GMT). No. of bitstreams: 1 Mialichi_JoseRoberto_D.pdf: 4426656 bytes, checksum: f54944bc3408b22608afdd373e3445dd (MD5) Previous issue date: 2010<br>Resumo: Esta tese de doutorado apresenta resultados experimentais do crescimento de pontos quânticos de InAs diretamente sobre InGaAsP de baixa energia de bandgap (?g=1420 nm), cujo desenvolvimento visa a obtenção de um meio ativo com emissão na banda C (1520¿1570 nm)
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20

Ceppe, Jean-Baptiste. "Éléments de dynamique du laser pour l'élaboration d'une source micro-onde miniaturisée sur la base de la double émission monomode d'un laser à mode de galerie." Thesis, Rennes 1, 2018. http://www.theses.fr/2018REN1S067/document.

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Ces travaux de thèses portent sur l’étude de la dynamique du laser à mode de galerie dans le but de réaliser une source micro-onde en utilisant un laser à mode de galerie doublement monomode. Nous montrons ici les résultats expérimentaux sur le bruit relatif d’intensité (RIN) d’un laser à mode de galerie en verre ZBLALiP dopé aux ions Er3+. Outre l’aspect performances d’utilisation du laser, le spectre de RIN donne un certain nombre d’informations sur la dynamique du laser (temps de vie des photons, taux de pompage effectif, sources de bruit, ...).Les très forts facteur de qualités de ces réso
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21

Moore, Lee James. "Spectroscopy and dynamics of colloidal particles and systems at interfaces." Thesis, University of Oxford, 2012. http://ora.ox.ac.uk/objects/uuid:80b11157-18d9-4262-9432-c7fe82e24213.

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This thesis presents an investigation of the dynamic properties of wide range of interfacial systems, from colloidal particles in solution, through the realm of aerosols and onto studies of molecular adsorption at an interface. The primary experimental technique utilized is optical tweezers. An exploration of the history of the use of radiation pressure to manipulate matter is presented, followed by an introduction to how optical tweezers work. Some of the more advanced methods of tweezing are discussed, with an emphasis on the use of spatial light modulators (SLMs) to realise dynamic holograp
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Rasoloniaina, Alphonse. "Études expérimentales de dispositifs intégrés à base de micro-résonateurs à mode de galerie en verres actifs." Phd thesis, Université Rennes 1, 2014. http://tel.archives-ouvertes.fr/tel-01009345.

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Les microrésonateurs à mode de galerie passifs à base de cristal ou de verre fabriqués par la méthode de fusion possèdent un facteur de qualité limité à quelques 10E8. Ceci est généralement dû à la contamination de la surface du résonateur lors de sa fusion. Dans ces travaux, nous proposons de contourner cette limitation en utilisant des microrésonateurs actifs pour compenser les pertes. Afin de caractériser les microrésonateurs actifs de très haut facteur de qualité ainsi obtenu, nous nous appuyons sur la méthode CRDM (Cavity Ring Down Measurement). Cette méthode interférométrique est d'une p
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Balakireva, Irina. "Nonlinear dynamics of Kerr optical frequency combs." Thesis, Besançon, 2015. http://www.theses.fr/2015BESA2043.

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La présente thèse est consacrée à l’étude des peignes optiques de Kerr dans les résonateurs àmodes de galerie, au sein desquels la lumière peut être excitée par pompage externe. L’effet Kerrexistant dans ces résonateurs engendre des modes latéraux équidistants (dans le domaine spectral)de part et d’autre du mode excité, c’est à dire un peigne de fréquence. Cette thèse est diviséeen trois chapitres. Le premier est dédié à l’introduction de la génération de ces peignes et leurapplications. Le deuxième chapitre présente l’analyse de l’équation de Lugiato-Lefever, décrivantde manière analytique le
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24

Choi, Sumin. "Zinc oxide nanophotonics : toward quantum photonic technologies." Thesis, 2016. http://hdl.handle.net/10453/62382.

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University of Technology Sydney. Faculty of Science.<br>Zinc oxide (ZnO) is a large bandgap (3.37 eV at room temperature) semiconductor and is a good candidate for short wavelength photonic devices such as laser diodes. A large exciton binding energy (60 meV) at room temperature in addition to the advantages of being able to grow various nanostructure forms have made ZnO suitable for a wide range of applications in optoelectronic devices. Driven by the rapid advance of nanophotonics, it is necessary to develop single photon sources (SPSs) and optical resonators in new class of materials. In p
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25

Beier, Hope T. "Whispering-Gallery Modes in Quantum Dot Embedded Microspheres for Sensing Applications." 2009. http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7507.

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New methods of biological analyte sensing are needed for development of miniature biosensors that are highly sensitive and require minimal sample preparation. One novel technique employs optical resonances known as Whispering Gallery Modes (WGMs). These modes arise from total internal reflection of light at the internal surface of a high index microsphere within a low index medium and produce an evanescent field that extends into the surrounding medium. The WGMs produce multiple narrow spectral peaks that shift position with variations in the local index of refraction sampled by the evanescent
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26

Humphrey, Michael Joseph. "Calculation of coupling between tapered fiber modes and whispering-gallery modes of a spherical microlaser." 2004. http://digital.library.okstate.edu/etd/umi-okstate-1077.pdf.

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27

Yen-WenWan and 萬妍彣. "Analysis of whispering-gallery modes in the cavity of a sonic crystal." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/83971463794181170248.

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碩士<br>國立成功大學<br>機械工程學系碩博士班<br>101<br>Sonic crystals (phononic crystals) are periodic elastic composite materials. Such artificial crystals can exhibit acoustic or elastic band gaps in which sound and vibration are all forbidden in any direction, giving rise to prospective applications such as elastic/acoustic filters and noise/vibration isolations. One particularly interesting aspect of sonic crystals is the possibility of creating crystal defects to confine the elastic/acoustic waves in localized modes. Because of locally breaking the periodicity of the structure, the defect modes can be crea
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Kuo, Mei-Chia, and 郭美家. "Whispering-gallery Modes and Light Emission from Silicon-Nanocrystal-Embedded Microdisk Resonators." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/86996841071364396673.

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碩士<br>國立臺灣大學<br>光電工程學研究所<br>103<br>We have successfully fabricated optically active microdisk resonators with Si nanocrystals grown by plasma enhanced chemical vapor deposition (PECVD) and the post-annealing process. The room-temperature photoluminescence from single microdisk shows the characteristic modal structure of whispering-gallery modes in the wavelength between 600nm and1000nm. We fabricated Si-nanocrystal-embedded microdisk resonators by two different lithography processes. We use standard lithography to fabricate the microdisk resonators with diameters of 10μm and 20μm and electron-
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29

Lu, Tsan-Wen, and 盧贊文. "Researches on Photonic Crystal Microcavities and Devices Based on Whispering-Gallery Modes." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/39732083991251735110.

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博士<br>國立交通大學<br>光電工程系所<br>97<br>Whispering-gallery (WG) mode with high quality (Q) factor and multi-directional resonance is very suitable for serving as the active laser sources and passive devices with specific functionalities in photonic integrated circuits (PICs). In this dissertation, we design, fabricate, and characterize various photonic crystal (PhC) based micro- and nano-cavities with high Q WG modes. The possible applications are also investigated and discussed. In the beginning of this dissertation, we introduce the related research resources for researches on two-dimensional PhC
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Vincent, Serge M. "Full-Vector Finite Difference Mode Solver for Whispering-Gallery Resonators." Thesis, 2015. http://hdl.handle.net/1828/6630.

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Optical whispering-gallery mode (WGM) cavities, which exhibit extraordinary spatial and temporal confinement of light, are one of the leading transducers for examining molecular recognition at low particle counts. With the advent of hybrid photonic-plasmonic and increasingly sophisticated forms of these resonators, the importance of supporting numerical methods has correspondingly become evident. In response, we adopt a full-vector finite difference approximation in order to solve for WGM's in terms of their field distributions, resonant wavelengths, and quality factors in the context of natur
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Huang, Cheng-ren, and 黃正仁. "Excitation of whispering gallery modes in a microsphere by an etch-eroded fiber coupler." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/96497475695725689681.

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碩士<br>國立中央大學<br>光電科學研究所<br>95<br>Microsphere resonators have attracted a lot of interest in recent years, due to ultra high quality factor and small modal volume. Numerous methods for coupling energy into the whispering gallery modes of a microsphere have been demonstrated, however most of them are limited by either low coupling efficiency or mechanical instability. In this thesis, an etch-eroded fiber coupler was investigated, and better coupling efficiency and acceptable stability was obtained. The orders of the WGMs and the quality factors can be determined by analyzing optical transmission
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Chen, Yong-Zhi, and 陳泳智. "Excitation of fundamental whispering-gallery modes in a microsphere by a half-block coupler." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/46630769027455963367.

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碩士<br>國立中央大學<br>光電科學研究所<br>95<br>A simple method for the excitation of fundamental whispering-gallery modes in a BK7 glass microsphere by a side-polished fiber half-block coupler is demonstrated. The coupler is made of the single-mode fiber (Corning SMF-28) which has an effective refractive index of 1.4682 @1550nm. The radius and refractive index of the microsphere equal to 150± 1.5 um and 1.500065 @1550 nm, respectively. The resonant modes are identified from the transmission spectrum, which indicates that the quality factor of 17000, free spectral range of 1.7 nm and coupling efficiency of 1
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Lin, Che-An, and 林哲安. "Fabrication of Si Microsphere Resonators with High Q Whispering Gallery Modes by Using Si-cored Fibers." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/55257306918468424943.

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碩士<br>國立臺灣大學<br>光電工程學研究所<br>103<br>Single-crystal silicon-cored fibers were made by using a combined techniques of powder-in-tube and vertical-drawing. Much cheaper polycrystalline silicon powders substituting expensive single-crystal silicon powders or seed rods were packed into a fused silica tube. By optimizing the drawing parameters, meter-long silicon-cored fibers were obtained with ultralow transmission losses because the entire lengths of silicon cores were single crystalline. The Si-cored fibers were drawn with resultant silica cladding and Si core diameters being in the range of 100-3
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Hea, Theodore Aaron. "Analysis, design and application of a tee-excited traveling-wave resonator for generation of whispering-gallery modes." 1994. http://catalog.hathitrust.org/api/volumes/oclc/32941521.html.

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Thesis (M.S.)--University of Wisconsin--Madison, 1994.<br>Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 74-75).
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Chen, Jhih Yuan, та 陳知遠. "The Influence of Single-crystalline Gold Plate Substrate on the Whispering-Gallery Modes of Semiconducting Fluorescent π-Conjugated Polymer Microspheres". Thesis, 2017. http://ndltd.ncl.edu.tw/handle/ahh948.

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碩士<br>國立清華大學<br>化學系<br>105<br>Light can be totally internally reflected inside a sphere made of dielectric material with refractive index higher than the environment. At specific wavelengths, standing waves are established, forming the photonic whispering-gallery modes (WGMs). On the interface of air and gold, surface plasmons (SPs) can be excited by photons if the momentum matching condition is fulfilled. When the spherical WGM resonator is placed on the gold substrate, the evanescent near fields of the WGMs can interact with the gold substrate. Depending on the polarization and the orbiting
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36

Amini, Sina. "Atomic Force Microscope Based Near-field Imaging for Probing Cell Surface Interactions." Thesis, 2013. http://hdl.handle.net/1969.1/149335.

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Near-membrane and trans-membrane proteins and their interactions with the extracellular matrix (ECM) can yield valuable information about cell dynamics. However, advances in the field of nanoscale cellular processes have been hindered, in part, due to limits imposed by current technology. In this work, a novel evanescent field (EF) imaging technique is designed, modeled, created and tested for near-field imaging in the apical surface of cells. This technique and Förster resonance energy transfer (FRET) were used to investigate interactions between integrins on the cell surface and the ECM prot
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"Electronic, Spin and Valley Transport in Two Dimensional Dirac Systems." Doctoral diss., 2017. http://hdl.handle.net/2286/R.I.43929.

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abstract: This dissertation aims to study and understand relevant issues related to the electronic, spin and valley transport in two-dimensional Dirac systems for different given physical settings. In summary, four key findings are achieved. First, studying persistent currents in confined chaotic Dirac fermion systems with a ring geometry and an applied Aharonov-Bohm flux, unusual whispering-gallery modes with edge-dependent currents and spin polarization are identified. They can survive for highly asymmetric rings that host fully developed classical chaos. By sustaining robust persistent cur
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