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Rozprawy doktorskie na temat „Subwavelength photonics”

Autor: Grafiati

Data publikacji: 23 listopada 2024

Data aktualizacji: 31 lipca 2025

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1

Zhang, Jianhao. "Subwavelength engineering of silicon waveguides and cavities for nonlinear photonics." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS332/document.

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Les effets Pockels de deuxième ordre et les effets Kerr de troisième ordre font partie des effets importants exploités pour la modulation de la lumière et la génération de sources dans les plateformes technologiques de la photonique intégrée. Pour tirer parti de ces non-linéarités en photonique au silicium, l'utilisation de structures optiques sub-longueurs d'onde a été explorée. Dans ce contexte, ce travail de thèse s'est concentré sur deux aspects principaux, notamment : 1) L’exploration d'un nouveau schéma de cavité photonique pour tirer profit de l'effet Pockels électro-optique dans les st

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Rolly, Brice. "Subwavelength photonic resonators for enhancing light-matter interactions." Thesis, Aix-Marseille, 2013. http://www.theses.fr/2013AIXM4366.

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Les antennes optiques sont des structures qui permettent de convertir, dans les deux sens, l'énergie électromagnétique entre un faisceau lumineux et une source (ou un absorbeur) localisée en son sein. L'utilisation de résonateurs de taille inférieure à la longueur d'onde permet de réaliser cette fonction de manière efficace, sur une bande spectrale relativement étendue, et d'avoir une antenne compacte.La bonne connaissance des propriétés optiques de ces résonateurs, pris séparément, et de leurs couplages entre eux, est nécessaire pour pouvoir proposer des designs d'antenne efficaces.Dans cette

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Wadsworth, Samuel Lanning. "Multilayered planar periodic subwavelength microstructures for generating and detecting circularly polarized thermal infrared radiation." Doctoral diss., University of Central Florida, 2011. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5075.

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Generation and detection of circularly-polarized (CP) radiation in the 8- to 12-micrometers] band of the infrared (IR) spectrum is crucial for polarization sensing and imaging scenarios. There is very little naturally occurring CP radiation in the long-wave IR band, so that useful functionalities may be obtained by exploiting preferential radiation and transmission characteristics of engineered metamaterials. Conventional CP devices in the IR utilize birefringent crystals, which are typically bulky and expensive to manufacture. The operation of these devices is generally optimized at a single

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Kut, King Kan Warren. "Design and characterization of subwavelength grating (SWG) engineered silicon photonics devices fabricated by immersion lithography." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPAST099.

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La technologie photonique sur silicium s'appuie sur les procédés matures de fabrication de l'industrie du semi-conducteur pour produire des composants opto-électroniques à échelle industrielle. Les métamatériaux à base de réseaux sub-longueur d'onde permettent de contrôler le confinement du mode et la dispersion, et ont ainsi été implémentés pour démontrer des performances de pointe de composants photoniques intégrés. Les effets de diffraction et de réflexions sont supprimés dans les matériaux sub-longueur d'onde. Leurs dimensions sont petites et sont environ de 100 nm. Jusqu'à présent, la maj

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Fievre, Ange Marie P. "Uniquely Identifiable Tamper-Evident Device Using Coupling between Subwavelength Gratings." FIU Digital Commons, 2015. http://digitalcommons.fiu.edu/etd/1762.

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Reliability and sensitive information protection are critical aspects of integrated circuits. A novel technique using near-field evanescent wave coupling from two subwavelength gratings (SWGs), with the input laser source delivered through an optical fiber is presented for tamper evidence of electronic components. The first grating of the pair of coupled subwavelength gratings (CSWGs) was milled directly on the output facet of the silica fiber using focused ion beam (FIB) etching. The second grating was patterned using e-beam lithography and etched into a glass substrate using reactive ion etc

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6

Mazuir, Clarisse. "Design, fabrication, and testing of high-transparency deep ultra-violet contacts using surface plasmon coupling in subwavelength aluminum meshes." Doctoral diss., University of Central Florida, 2011. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4979.

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The present work aims at enhancing the external quantum efficiencies of ultra-violet (UV) sensitive photodetectors (PDs) and light emitting diodes (LEDs)for any light polarization. Deep UV solid state devices are made out of AlGaN or MgZnO and their performances suffer from the high resistivity of their p-doped regions. They require transparent p-contacts; yet the most commonly used transparent contacts have low transmission in the UV: indium tin oxide (ITO) and nickel-gold (Ni/Au 5/5 nms) transmit less than 50% and 30% respectively at 300 nm. Here we investigate the use of surface plasmons (S

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Nuño, ruano Paula. "Optomechanical silicon metamaterials for Brillouin-based devices." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPAST122.

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La photonique au silicium suscite un immense intérêt dans la recherche fondamentale et le développement technologique et commercial en raison de sa compatibilité avec les techniques de fabrication et de traitement standard de l'industrie électronique. Traditionnellement développée pour les applications de télécommunication de données, la photonique au silicium explore aujourd'hui d'autres domaines, tels que le traitement des signaux sur puce, la détection, les communications entre la puce et l'espace libre, et même l'informatique quantiques. Ce large éventail d'applications est possible grâce

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8

Lou, Fei. "Design, fabrication and characterization of plasmonic components based on silicon nanowire platform." Doctoral thesis, KTH, Optik och Fotonik, OFO, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-143953.

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Optical interconnects based on CMOS compatible photonic integrated circuits are regarded as a promising technique to tackle the issues traditional electronics faces, such as limited bandwidth, latency, vast energy consumption and so on. In recent years, plasmonic integrated components have gained great attentions due to the properties of nano-scale confinement, which may potentially bridge the size mismatch between photonic and electronic circuits. Based on silicon nanowire platform, this thesis work studies the design, fabrication and characterization of several integrated plasmonic component

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9

Ye, Erika. "Periodic subwavelength photonic structures." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/111287.

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Thesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2015.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 110-117).<br>Three applications of the interaction of light with periodic dielectric structures are investigated. The first application is large-area spectroscopy, for which we use the mid-field diffraction pattern generated by the light source passing through a transmission grating to determine its spectral composition. By utilizing a large grating size, we are able to achieve resolutions

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10

Lombardo, David. "Design and Fabrication of Suspended Waveguides With Photonic Grating Structures." University of Dayton / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1591796311145344.

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11

Nikkhah, Hamdam. "Enhancing the Performance of Si Photonics: Structure-Property Relations and Engineered Dispersion Relations." Thesis, Université d'Ottawa / University of Ottawa, 2018. http://hdl.handle.net/10393/37144.

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The widespread adoption of photonic circuits requires the economics of volume manufacturing offered by integration technology. A Complementary Metal-Oxide Semiconductor compatible silicon material platform is particularly attractive because it leverages the huge investment that has been made in silicon electronics and its high index contrast enables tight confinement of light which decreases component footprint and energy consumption. Nevertheless, there remain challenges to the development of photonic integrated circuits. Although the density of integration is advancing steady and the integra

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12

Ruan, 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.

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13

Khanfar, Hazem. "Polarizing Optical Devices Based on Embedded One-Dimensional Subwavelength-Structured Photonic-Crystal Layers." ScholarWorks@UNO, 2009. http://scholarworks.uno.edu/td/1022.

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Quarter-wave retarders (QWR) that employ total internal reflection (TIR) and interference of light in a transparent thin-film coating at the base of a prism are presented. Explicit equations that guide the optimal design are provided. The optimal refractive index and normalized thickness of QWR coatings on glass and ZnS prisms are determined as functions of the internal angle of incidence from 45o to 75o. An achromatic QWR that uses an Si3N4- coated N-BK10-Schott glass prism is also presented with retardance error of 3o over the 400-600 nm wavelength range. An iterative procedure for the desig

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14

Khodami, Maryam. "Dispersion Characteristics of One-dimensional Photonic Band Gap Structures Composed of Metallic Inclusions." Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/23179.

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An innovative approach for characterization of one dimensional Photonic Band Gap structures comprised of metallic inclusions (i.e. subwavelength dipole elements or resonant ring elements) is presented. Through an efficient S- to T-parameters conversion technique, a detailed analysis has been performed to investigate the variation of the dispersion characteristics of 1-D PBG structures as a function of the cell element configuration. Also, for the first time, the angular sensitivity of the structure has been studied in order to obtain the projected band diagrams for both TE and TM polarizations

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15

Torrijos, Morán Luis. "Photonic Applications Based on Bimodal Interferometry in Periodic Integrated Waveguides." Doctoral thesis, Universitat Politècnica de València, 2021. http://hdl.handle.net/10251/172163.

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Tesis por compendio<br>[ES] La fotónica de silicio es una tecnología emergente clave en redes de comunicación e interconexiones de centros de datos de nueva generación, entre otros. Su éxito se basa en la utilización de plataformas compatibles con la tecnología CMOS para la integración de circuitos ópticos en dispositivos pequeños para una producción a gran escala a bajo coste. Dentro de este campo, los interferómetros integrados juegan un papel crucial en el desarrollo de diversas aplicaciones fotónicas en un chip como sensores biológicos, moduladores electro-ópticos, conmutadores total

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16

Shih, Bing-Hao, and 施秉豪. "Subwavelength grating devices for silicon photonics applications." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/72125727549035450349.

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碩士<br>國立中山大學<br>光電工程學系研究所<br>104<br>This thesis focuses on the design and simulation of subwavelength waveguide gratings, which reflect the light at its Bragg wavelength, implemented on silicon-on-insulator (SOI) platform. This photonic device has been utilized as an optical filter, a wavelength division multiplexer, and a sensing element. However, the strong side-lobe ripples arise from the waveguide gratings would cause serious channel crosstalks once the waveguide gratings are used to implement wavelength division multiplexing devices. In this work, we incorporate Gaussian-apodized structur

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17

Granchi, Nicoletta. "Imaging of subwavelength light localization in all-dielectric complex nanostructures." Doctoral thesis, 2022. http://hdl.handle.net/2158/1264978.

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This thesis work is located within the framework of light localization in all-dielectric nanostructures, from single Mie resonators to correlated disordered media. The application of groundbreaking imaging techniques like Near-field and Dark-field hyperspectral imaging on such complex architectures, is here proven to be a fascinating tool not only for the optical characterization, extremely important to understand their fundamental physical properties, but also an efficient vehicle for probing their practical potentialities. The presented experimental results are carefully supported by theory

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Zhang, Yang active 2013. "Multi-layer silicon photonic devices for on-chip optical interconnects." Thesis, 2013. http://hdl.handle.net/2152/23344.

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Large on-chip bandwidths required for high performance electronic chips will render optical components essential parts of future on-chip interconnects. Silicon photonics enables highly integrated photonic integrated circuit (PIC) using CMOS compatible process. In order to maximize the bandwidth density and design flexibility of PICs, vertical integration of electronic layers and photonics layers is strongly preferred. Comparing deposited silicon, single crystalline silicon offers low material absorption loss and high carrier mobility, which are ideal for multi-layer silicon PIC. Three differen

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Tang, Lingling. "Subwavelength-scale Light Localization in Complete Photonic Bandgap Materials." Diss., 2010. http://hdl.handle.net/10161/2980.

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<p>The objective of this dissertation work is to examine light localization in semiconductors provided by a complete photonic bandgap via three-dimensional (3D) woodpile photonic crystals. A 3D photonic crystal is a periodic nanostructure that demonstrates omni-directional Bragg reflection. These materials are anticipated to become a powerful tool for engineering light propagation and localization within subwavelength scales due to their complete photonic bandgap and the distinctive dispersion relation. </p><p>The approach of realizing microcavities in this dissertation is to combine multi-di

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20

Chang, Ping-Chien, and 張鈵健. "Wafer-scale subwavelength grating formation and its photonic applications." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/84615583506020372533.

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碩士<br>國立中山大學<br>光電工程學系研究所<br>104<br>This thesis focuses on the modification of our mirror-tunable laser interference system for short-period (200~400 nm) grating formation over a large sample area with superior uniformity. Experimental results indicate that the resist gratings have a fill factor variation of < 1.3%, a thickness variation of < 3%, and a grating period variation of < 0.15%. Such a superior grating structure then serves as the building block to realize RGB reflective filters and wire-grid optical polarizers. The gratings are also applied for liquid crystal alignment on a flexible

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21

Wang, Lingyun Ph D. "Embedded metallic grating and photonic crystal based scanning probes for subwavelength near-field light confinement." Thesis, 2012. http://hdl.handle.net/2152/ETD-UT-2012-12-6671.

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Near-field light confinement on scanning probe is the backbone technology for near-field imaging with subwavelength resolution that overcomes the diffraction limit by exploiting the properties of evanescent waves. The fusion of the photonics and the latest nanofabrication technology creates emerging frontier for near-field light confinement research with new design approach. The propagation of light can now be controlled by periodical structure at subwavelength scale with low loss in the artificially synthesized dielectric material. New light propagation patterns can now be implemented in subw

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Silva, Solange Vieira da. "Trapping light in metal and topological nanostructures." Doctoral thesis, 2020. http://hdl.handle.net/10316/96362.

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Tese no âmbito do Doutoramento em Engenharia Electrotécnica e de Computadores, ramo de especialização em Telecomunicações, orientada pelos Professores Doutores Mário Gonçalo Mestre Veríssimo Silveirinha e Tiago André Nogueira Morgado e apresentada no Departamento de Engenharia Electrotécnica e de Computadores da Faculdade de Ciências e Tecnologia da Universidade de Coimbra.<br>Nanophotonics is a field of research dedicated to study the interactions of nanosized-objects with light. One of the goals of nanophotonics is to enable the miniaturization of optical components at a competitive scale

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Hung, Shih-Ting, and 洪士庭. "The study of negative refraction photonic crystals lens and the antireflection layers of solar cell in subwavelength structure." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/60058940020323856023.

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碩士<br>國立清華大學<br>原子科學系<br>93<br>Owing to the vigorous development of nano-technology, the bandgap region of photonic crystals or electro-optical devices can be shifted from microwave to infrared or visible light and applications of photonic crystals(PBG) are more extensively and practically. Nano-technology can apply to fabricate many kinds of novel electro-optical devices. Most importantly, it can reduce the volume of these devices substantially and thus will be engaged in highly concentrated integration of electro-optical devices. In this thesis, we study three kinds of subwavelength structur

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Chen, Wei Fan, and 陳緯帆. "Optimized Subwavelength Period of One-Dimensional Photonic Crystal to Increase Light Extraction Efficiency of GaN-Based Light Emitting Diode." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/66238144752413308475.

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碩士<br>長庚大學<br>電子工程學系<br>101<br>For last few years, the GaN-based light emitting diodes(LEDs) have great developed. But in the illumination applications, light extraction of GaN-based LEDs remains limited, one of the most significant problem is the total internal reflection of trapped light within GaN material with high refractive index. In this dissertation, for improving the light extraction efficiency, electron-beam lithography and inductively plasma dry etching were used to achieve sub-wavelength grating-periodic structures with exact dimensions on the p-side of nitride-based LEDs with mult

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