Дисертації з теми "All-dielectric"
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Karvounis, Artemios. "All dielectric reconfigurable metamaterials." Thesis, University of Southampton, 2017. https://eprints.soton.ac.uk/424497/.
Повний текст джерелаGili, Valerio flavio. "All-dielectric nonlinear nanophotonics." Thesis, Sorbonne Paris Cité, 2018. http://www.theses.fr/2018USPCD012/document.
Повний текст джерелаAll-dielectric nonlinear meta-optics is attracting a great deal of interest thanks to the feasibility of high refractive-index contrast nanostructures available with semiconductor lithography. While third order nonlinear effects have been reported in silicon-on-insulator nanoantennas, the AlGaAs-on-insulator platform has recently enabled the demonstration of second harmonic generation, owing to the non-centrosymmetry of this material. This PhD thesis illustrates our recent activity on AlGaAs-on-AlOx nonlinear nanoantennas, where AlOx is obtained from selective wet etching of micrometer-thick aluminium-rich AlGaAs epitaxial layer. Such a low refractive index substrate allows to effectively decouple the nanoantenna modes from the underlying GaAs (100) wafer. The thesis first introduces the numerical, experimental and technological methods employed. Afterwards, a review of the results obtained in nonlinear signal generation in single nanoantennas and in complex structures is given. All our experimental results pave the way towards nonlinear signal generation and manipulation at the nanoscale, and point towards applications such as nonlinear holography, background-free goniometry and night vision
Yan, Bing. "All-dielectric superlens and applications." Thesis, Bangor University, 2018. https://research.bangor.ac.uk/portal/en/theses/alldielectric-superlens-and-applications(5f73f599-02c6-4a14-b26a-61c8801601c6).html.
Повний текст джерелаLei, Qin. "All dielectric composites for metamaterial applications." Thesis, University of Oxford, 2015. https://ora.ox.ac.uk/objects/uuid:2dd643a5-7590-44a2-833a-148ffaa655f6.
Повний текст джерелаDaskalakis, Konstantinos. "Room-temperature polariton condensates in all-dielectric microcavities." Thesis, Imperial College London, 2014. http://hdl.handle.net/10044/1/24462.
Повний текст джерелаDeSandre, Lewis Francis. "LASER DAMAGE MEASUREMENTS ON ALL-DIELECTRIC NARROW-BAND FILTERS." Thesis, The University of Arizona, 1985. http://hdl.handle.net/10150/275258.
Повний текст джерелаMackey, Christopher Paul. "Laser calorimetric studies of optical absorption in all dielectric multilayer coatings." Thesis, Queen's University Belfast, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.334587.
Повний текст джерелаOzdemir, Aytekin, and Aytekin Ozdemir. "High Efficient Ultra-Thin Flat Optics Based on Dielectric Metasurfaces." Diss., The University of Arizona, 2018. http://hdl.handle.net/10150/626664.
Повний текст джерелаHsieh, Chih-Hung Ph D. Massachusetts Institute of Technology. "Design and manufacturing of all-dielectric optical metamaterial with gradient index of refraction." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/100120.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (pages 103-106).
Gradient index (GRIN) materials offer the most general manipulation over wave fields of light compared to conventional refractive optics, where the light is deflected by the curved surface. The creative way to implementing GRIN optics is to construct a subwavelength structure with the electromagnetic characteristics that are unavailable via the natural material. This artificial GRIN structure also known as "metamaterial" can be classified into two general categories: film and slab GRIN optics, depending on the propagation direction of light penetrating through or propagating along the metamaterial. In this dissertation, two different purposes of all-dielectric GRIN optics on (1) film: light extraction enhancement of the scintillator; (2) slab: aberration-free focusing using Lüneburg lens, are both investigated. The scintillator made by ceramics like Lutetium Yttrium Orthosilicate (LYSO) possesses higher index of refraction at 1.82 than the surrounding environment, which causes extraction loss due to index mismatching and total internal reflection (TIR) from scintillator to photodetector. A hybrid structure including two-dimensional photonic slab covered by the nanocone structure on the top was devised to recycle the energy loss from TIR and to create an index-matching layer in between. Design parameters of the hybrid structure were optimized by the simulation based on rigorous coupled-wave analysis, and the fabrication of hybrid structure was patterned by nanospheres (for nanocone structure) and laser interference (for photonic slab) lithography, respectively. Reactive ion etching (RIE) facilitated pattern transfer after two separate lithography processes. Finally, the characterization of nanostructured scintillator was performed with the ionizing source. The rest of this research focuses on the implementation of the slab GRIN optics: Nanostructured Lüneburg lens. The Lineburg lens is an aberration-free lens that can perfectly focus light on the opposite edge of the lens area, and such property can be used for light coupling from fiber to waveguide in the Silicon photonics. We designed the nanostructured Lineburg lens on the silicon-on-insulator substrate using effective index of refraction computed by photonic band theory, and the fabrication was carried out by the e-beam lithography and RIE process. The device characterized by near-field scanning optical microscopy exhibited the single focusing behavior under fundamental mode illumination via the intensity map over the lens region. In addition, the bi-foci phenomenon under higher order mode illumination was also revealed in the finite difference time domain simulation, and the ray picture for explaining the bi-foci was also included using Wigner distribution function and Hamiltonian ray-tracings.
by Chih-Hung Hsieh.
Ph. D.
Kim, Dug Young. "Interferometric measurements of nonlinear optical properties for all optical switching applications in dielectric waveguides." Diss., The University of Arizona, 1994. http://hdl.handle.net/10150/186968.
Повний текст джерелаLang, Ian Dewi. "The degradation of all-dielectric self supporting cables installed in high potential electro-magnetic fields : a theoretical and practical evaluation of optical fibre cables strung independently on overhead power transmission lines." Thesis, University of South Wales, 2001. https://pure.southwales.ac.uk/en/studentthesis/the-degradation-of-alldielectric-self-supporting-cables-installed-in-high-potential-electromagnetic-fields(5a7dee38-9f9b-40f8-8259-2e3d5386e292).html.
Повний текст джерелаGe, Yang. "Printed Charge Storage Capacitor." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2018. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-234123.
Повний текст джерелаNedoma, Jakub. "Vliv samonosného optického kabelu na mechaniku venkovního vedení VN." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442472.
Повний текст джерелаKomar, Andrei. "Tunable All-dielectric Metasurfaces: Fundamentals and Applications." Phd thesis, 2018. http://hdl.handle.net/1885/171649.
Повний текст джерелаWang, Chian Wan, and 王千萬. "The Study and Fabrication of All-dielectric anticounterfeting Ink." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/73170305406824781051.
Повний текст джерела輔仁大學
物理研究所
83
The anticounterfeting ink can be produced by mixing anticounterfeting thin film flakes and ink. Using the optical interference properties of anticounterfeting thin film, we can see different color when viewed from different angles. The roles of the ink play the protector of the anticounterfeting flakes and transferred the optical coating to the document surface. The proposes of the thesis are the study and fabrication of all- dielectric anticounterfeting ink. Two types of designs, one have reflected-type and transmitted-type and the other have transmitted-type all-dielectric coatings, have been theoretically considered, and chosen the optimized designs for the experimental fabrication. The anticounterfeting thin films have been coating on two different water-soluble substrates and we used cerium oxide and magnesium fluoride as the material of coating. These results of experiments are closed to the theoretical design. Finally, the fabrications of anticounterfeting thin film have been reached. The effect of paints made lead to results in good agreement with theoretical design.
Lechago, Buendía Sergio. "All-dielectric nanoantennas enabling on-chip wireless silicon photonics." Doctoral thesis, 2019. http://hdl.handle.net/10251/133074.
Повний текст джерела[CAT] La revolució habilitada per les aplicacions fotòniques durant les últimes dècades ha deixat la seua empremta en la societat actual tal com la coneixem. Exemples clars d'aquest impacte estan patents en, per exemple, l'enorme tràfic de dades generat per l'ús d'Internet o d'algunes tècniques biomèdiques amb fins diagnòstics o quirúrgics, que no es podrien entendre sense l'incessant desenvolupament dels sistemes òptics. La necessitat de combinar i miniaturitzar aquests sistemes per produir funcionalitats més avançades va donar lloc al naixement dels circuits fotònics integrats (PICs), que és on aquesta tesi va començar a prendre forma. En aquest sentit, observem limitacions en termes de flexibilitat o reconfigurabilitat inherents a la naturalesa guiada de la majoria dels PICs realitzats fins al moment. En el circuits plasmònics, tenim a mès les limitacions de les elevades pèrdues que les guies metàl·liques tenen a altes freqüències. La inclusió d'estructures sense fil (basades principalment en l'ús de nanoantenes plasmòniques) a la capa fotònica va sorgir per mitigar aquestes pèrdues, obrint també noves vies d'investigació. No obstant això, aquests dispositius encara presentaven rendiments molt pobres com a elements purament radiants en el règim de camp llunyà. Per superar aquestes deficiències, en aquest treball, vam introduir un enfocament innovador en el desenvolupament de dispositius sense fil a la nanoescala, que va donar forma al que anomenem on-chip wireless silicon photonics. Aquest nou concepte està basat en l'ús de nanoantenes de silici compatibles amb processos CMOS, que constitueixen les estructures clau que possibiliten un vast catàleg d'aplicacions en xarxes fotòniques de comunicació o en sensors ultra-integrats, així com per a la interconnexió de sistemes dieléctrics-plasmònics avançats. En l'àmbit de les comunicacions, gràcies a les senzilles regles de disseny per adaptar la directivitat de les antenes a les diverses aplicacions, vam poder demostrar per primera vegada transmissions de dades on-chip (mitjançant l'ús d'antenes altament directives) en xarxes reconfigurables o desenvolupar un dispositiu per generar a voluntat focus electromagnètics de manera dinàmica en espais bidimensionals (gràcies a antenes amb una directivitat més baixa). D'altra banda, en el camp del biosensing, vam dissenyar i fabricar un sensor lab-on-a-chip per a la classificació de micropartícules, basat en l'emprament d'antenes dielèctriques amb un rendiment a l'avantguarda dels millors dispositius de l'estat de l'art, que inclou el subsistema òptic més compacte demostrat fins al moment. Finalment, vam ser capaços de connectar experimentalment i de manera eficient antenes basades en silici amb estructures plasmònics per al desenvolupament de noves aplicacions en la nanoescala, unint els avantatges del on-chip wireless silicon photonics per a comunicacions en xip, conformació dinàmica de feixos o biosensat amb els avantatges de la plasmònica per a la manipulació e interacció amb llum.
[EN] The revolution sparked by photonic applications during the last decades has made its mark in society, as we currently know it. Clear examples of this impact are patent in, for instance, the colossal worldwide data traffic generated by the use of the Internet or the widespread utilization of some biomedical techniques for diagnostic or surgical purposes, which could not be understood without the ceaseless development of optical systems. The necessity of combining and miniaturizing these systems to enable advanced functionalities gave birth to the development of photonic integrated circuits (PICs), which is the main framework within which this thesis began to take shape. Along these lines, we noticed restricted limitations in terms of flexibility or reconfigurability inherent to the wired-based nature of most PIC implementations carried out so far. In the case of plasmonic circuitry, there are additional shortcomings arising from the prohibitive losses of metallic waveguides at very high frequencies. The inclusion of wireless structures (mostly based on plasmonic nanoantennas) at the photonic layer emerged to mitigate these limiting losses, also opening new research avenues. However, these devices still presented poor performances as purely radiating elements in the far-field regime. In order to overcome these lacks, in this work, we introduced a novel version to wireless approaches at the nanoscale in what we called on-chip wireless silicon photonics. This new concept was built upon the use of CMOS-compatible silicon-based nanoantennas, which constitute the key enabling structures of a diverse catalogue of applications in photonic communication networks or ultra-integrated sensors as well as for interfacing advanced dielectric-plasmonic systems. In the scope of communications, thanks to the easiness to tailor the antenna directivity, we were able to experimentally demonstrate on-chip data transmission flows in reconfigurable networks for the first time (by using highly directive antennas) or to develop dynamically tailor-made interference patterns to create focused spots at will on a 2D arrangement (enabled by antennas with a lower directivity). On the other hand, in the field of biosensing, we experimentally implemented a dielectric antenna-based lab-on-a-chip device for microparticle classification with state-of-the-art performance, which included the most compact optical subsystem demonstrated so far. Finally, we were able to efficiently interface silicon-based antennas to plasmonic systems to develop new advanced functionalities at the nanoscale, by putting together the advantages of on-chip wireless silicon photonics for on-chip communications, beam-shaping tailoring or lab-on-a-chip sensing with the advantages of plasmonics for light concentration and manipulation.
Lechago Buendía, S. (2019). All-dielectric nanoantennas enabling on-chip wireless silicon photonics [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/133074
TESIS
Lin, Jun-Han, and 林均翰. "All-dielectric metalenses without polarization selection at monochromatic visible wavelength." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/ndr3y3.
Повний текст джерела國立臺灣大學
光電工程學研究所
107
Ultrathin, flat optical devices of high performance can be achieved by using metasurfaces that are typically constructed of artificial patterns of subwavelength depth. Metasurfaces can be designed to generate symmetrical wave front where the term, metalenses, has been widely used. In this study, we have introduced a new design principle to develop metalenses without polarization selection instead of using the Pancharatnam-Berry phase design concept. Dielectric materials, GaN and Silicon, have been chosen to realize our metalenses without polarization selection. A commercial software, CST, has been utilized to achieve the phase retardation distribution of the metalenses by simulating the behavior of light-matter interaction for each subwavelength building block. The metalenses have been fabricated by employing the Elionex e-beam 7000 lithography equipment and the ICP system. The polarization insensitivity of the metalenses has been inspected in this study as well. Moreover, it is worth noting that the measured focusing efficiency of our polarization-insensitive metalenses is as high as 90% or higher.
Chong, Katie Eve. "Optically-Induced Magnetic Response in All-Dielectric Nanodisk Composite Structures." Phd thesis, 2017. http://hdl.handle.net/1885/119256.
Повний текст джерелаMicallef, Robert William. "A theoretical study of all-optical nonlinear phenomena in dielectric waveguides." Phd thesis, 1998. http://hdl.handle.net/1885/144249.
Повний текст джерелаTseng, Chi-Wei, and 曾紀維. "Low Cost All-Dielectric Thin-Film Solar Cell Using Diffuse Medium Reflectors." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/91736350697345713138.
Повний текст джерела國立交通大學
電子工程學系 電子研究所
103
In first two chapters of thesis, basic introduce solar cells and do some literature review. Dielectric mirrors have recently emerged for solar cells due to the advantages of lower cost, lower temperature processing, higher throughput, and zero plasmonic absorption as compared to conventional metallic counterparts. The light trapping mechanism is enhanced by embedded TiO2 scatterers. In chapter 3, used RCWA calculate the reflectance of an ordered and disordered TiO2 array and found the disordered one had much wider reflectance.A randomly distributed TiO2 diffuse reflector will be discussed, and the result is then confirmed by a time domain method using FDTD calculation. In this work, it is shown that scatterers geometry is very important for diffuse reflector. Last part of chapter 3 has been proven that dielectric mirrors can be widely applicable to thin-film and thick wafer-based solar cells to provide for light trapping comparable to conventional metallic back reflectors at their respective optimal geometries. Finally, the near-field angular emission plot of Poynting vectors is conducted, and it further confirms the superior light-scattering property of dielectric mirrors, especially for diffuse medium reflectors, despite the absence of surface plasmon excitation. The experimental results also confirm the high feasibility of dielectric mirrors for photovoltaics.
Gao, Weijie. "Effective-Medium-Clad Dielectric Components Towards Terahertz Integrated Platform." Thesis, 2021. https://hdl.handle.net/2440/135599.
Повний текст джерелаThesis (Ph.D.) -- University of Adelaide,School of Electrical and Electronic Engineering, 2022
Khan, Mohamed Fayaz. "Performance of all dielectric self-supporting fibre optic cable in high voltage environments." Thesis, 2003. http://hdl.handle.net/10413/4977.
Повний текст джерелаThesis (M.Sc.Eng)-University of Natal, Durban, 2003.
Li, Ya-Chen, and 李亞宸. "Study of oxide-confined all dielectric type GaN-based vertical-cavity surface-emitting lasers." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/dz4nk4.
Повний текст джерела國立交通大學
光電工程研究所
103
Due to the widespread applications of GaN-based material, such as indicators, back lighting, ambient lighting, display, optical storage, optical communication, etc., the GaN-based material has attracted much attention of academia and industry. And then, it is widely investigated and have many remarkable breakthroughs in performance. We have designed a kind of structure which shows both great optical and current confinement, and the oxide-confined structure was successfully applied into the optical pumping vertical-cavity surface-emitting laser. The fact that we obtained the transverse mode in the spectrum proves the abilities of optical and current confinement of this structure. The thesis is focus on the design and fabrication of the study of dielectric type GaN-based vertical-cavity surface-emitting lasers with lateral oxide-confined structure. In order to modify the intrinsic properties of the sapphire substrate, which consist of poor electric and thermal conductivity, and overcome the difficulty in the process of the epitaxial DBR, we used the laser lift-off and wafer bonding technique to fabricate a dielectric type GaN-based VCSEL. After the complicated fabrication process, we observed the existence of transverse modes in the measured spectra. This fact proves that the dielectric confined structure can achieve the two targets of optical and current confinement. Although the device did not achieve the laser action, we measured the spectrum with narrow linewidth. In the future, the devices could achieve the laser action after we improve the fabrication parameters and make the structure good quality.
Fa-Ming, Chen, and 陳發明. "Simulation and Fabrication of 1550nm/1625nm or 1650nm All-dielectric Fabry-Perot Fiber Filters." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/73371854732726507890.
Повний текст джерела國立雲林科技大學
電子與資訊工程技術研究所
86
The optical filter communication system has certain inherent advantages, which are Wide bandwidth, Small size and weight, Electrical isolation, and Immunity to interference, etc. Therefore, the development of the system is an irresistible force. The purpose of this paper is to investigate the 1.55um/(1.625um or 1.65um ) all-dielectric Fabry-Perot optical interference filters, which are used to eliminate the crosstalk interference between the monitor inspecting wavelength of the fiber observation system and the transmitting wavelength.The design demand is: isolation higher than 35db, insertion loss less than 1db,and the incident angle is 0 degree,using the high refractive material TiO2 and the low refractive material SiO2 to deposit on the glass substrate to form multilayer filters. By the simulation of various multilayer systems and analyzing the influence of layer thickness deviation,we obtain the better structures as below: system A2(1.55um pass/1.65mm stop, isolation 42.4db,insertion loss 0.37db), system A3(1.55um pass/1.65um stop, isolation 36.7db, insertion loss 0.37db), system B2(1.65um pass/1.55um stop, isolation 40. 1db, insertion loss 0.37db), system B3(1.65um pass/1.55um stop, isolation 37.5db, insertion loss 0.37db), system C(1.55um pass/1.625um stop, isolation 40.8db, insertion loss 0.37db), system D(1.625um pass/1.55um stop, isolation 41.6db, insertion loss 0.37db). Finally, the designed structures were deposited by e-gun evaporation, and the measurement matched the simulation very much.
Lu, Hsiao Chung, and 魯曉忠. "Simulation and Investigation of Narrow-band All-dielectric Fabry-Perot Interference Filter for DWDM System." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/84760219999069028823.
Повний текст джерела國立雲林科技大學
電子工程與資訊工程技術研究所
87
The optical fiber communication system has introduced for a period of time. As time goes on, people have more and more requirement for the application such as Internet access, high-quality videoconferencing and multimedia traffic. Dense wavelength division multiplexing(DWDM)is currently the leading technology in transmission links. In DWDM system each channel is related to a different wavelength, channel manipulations and particularly channel selection require optical wavelength selection(i.e., optical filtering). The purpose of this paper is to investigate narrow band all-dielectric Fabry-Perot optical interference filters, which are used to select required wavelength signal for each channel to transmit and/or receive. Besides, we have investigated the optical characteristics of Ta2O5(92%)/TiO2(8%) film. The design specification of the filter is: bandwidth less than 1nm, transmittance loss less than 1db, and the bandwidth for 30db down less than 2nm, design incident angle is 00. The materials using in design and simulation are following : the high refractive material TiO2 (nH=2.15) and the low refractive material SiO2 (nL=1.435). The substrate and incidence medium is glass(ns=1.52) and air(n0=1) respectively. By the simulation of various multilayer systems and analyzing the influence of layer thickness and refractive index deviation, we obtain the conclusion as below: 1. Except for type IV ( BW30db=2.71nm>2nm) and type VII (BW30db=2.15nm>2nm), the remainder are valid, 2. In order to keep the yield up to acceptable level, the error of film thickness and refractive index must keep as low as 0.03% and 4% respectively.
Yu, Li Yuang, and 游禮陽. "The Realization of highly efficient, all-dielectric-based thermal emitter at the mid-infrared regime." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/8dxwxp.
Повний текст джерела國立清華大學
材料科學工程學系
105
A mid-infrared thermal emitter with high emissivity property is proposed and fabri-cated. The thermal emitter is based on all-dielectric architecture where the intrinsic losses of dielectric materials are low. Therefore, we achieve a highly efficient thermal emitter relative to common thermal emitter through a novel approach- the array of low loss die-lectric particles. We characterize the thermal emitter based on all-dielectric architecture via the finite difference time domain method (lumerical). Kirchhoff's law states: For an arbitrary body emitting and absorbing thermal radiation in thermodynamic equilibrium, the emissivity is equal to the absorptivity for the same frequency, same direction, and same polarization. The law holds only when the condition of thermodynamic equilibrium is satisfied. In general, a good absorber is a good emitter. In the design stage, emissivity is regarded as absorptivity, which could be calculated and analyzed in simulation software. In lumerical simulation, absorptance of 97.6% is calculated at the wavelength of 9μm in all-dielectric-based thermal emitter. It is expected that all-dielectric-based thermal emitter possesses some high extent of emissivity. Besides, in numerical simulation result, power absorbed spatial distribution indicates that electromagnetic energy is dissipated within the array of all-dielectric cavities. In the fabrication stage, UV lithography is used to define the pattern of mid-infrared thermal emitter device. It is followed by the deposition of die-lectrics via E-gun evaporation technique. The pattern is formed after the lift-off process. In the measurement setup, the amount of radiant power of all-dielectric-based thermal emitter is measured by the Fourier transform infrared spectroscopy. Then, around 90% emissivity and quality factor of 2.5 are evaluated and calculated in the emission spectrum. Spatial coherence of thermal radiation field is also estimated through the response of emission field over a wide range of incident angles in the simulation.
Su, Ching-Hsing, and 蘇晉興. "Studies of All-Dielectric Cubic Nano-Antennas Using 3-D Finite Difference Time-Domain Numerical Models." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/453m3e.
Повний текст джерела國立臺灣大學
光電工程學研究所
106
In this thesis, we develop a parallelized three-dimensional (3-D) finite-difference time-domain (FDTD) numerical simulator by using the message passing interface (MPI) library code in C language. The main purpose of this research is to analyze the scattering properties of all-dielectric cubic nano-antennas, and the mechanism to produce unidirectional scattering. First, the total scattering cross-section and the radiation patterns are calculated. Then we analyze the wavelengths of the dipole resonances and the generalized Kerker''s condition. Moreover, to further increase the directionality of the scattered light, we consider the double nanocubes. Although the directionality of the scattered light can be enhanced by increasing the gap size between the nanocubes, the number and the intensity of the side lobes will be increased at the same time. We also consider a linear chain of nanocubes aligned in z direction, which can enhance the directionality and eliminate the unwanted side lobes simultaneously due to the diffraction grating effect. Finally, the asymmetric nanoparticles which can be utilized to switch the direction of scattered light are studied in detail. Because of the interference between the electric and magnetic dipole resonances stimulated simultaneously in each of the asymmetric nanoparticles, the direction of scattered light can be tuned to either right or left away from the incident wave direction.
WANG, WEI-CHENG, and 王韋程. "Investigation of Co-Alloy Encapsulated Cu Wires Fabricated on Porous Dielectric Layers by Using All-Electroless Plating Processes." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/60353811510876511892.
Повний текст джерела逢甲大學
材料科學與工程學系
105
Nowadays, the scales of integrated circuit along with advances in semiconductor technology and continuing to miniaturization, so it’s imperative to enhance the internal density and chip performance of the components. Recently, the development of the semiconductor industry is focused on reducing the width of metal wires and increasing stacking layers. In order to avoid the problem of RC delay caused by the reducing width and increasing length of the wires, it’s great concern and research on using high conductivity copper wires and low k dielectric layer materials. In this study, we use nanoporous dielectric ultra low k (ULK) materials, named Black DiamondTM III (BD III) to fabricate copper wires by all-electroless plating. We use the techniques, such as: (1) Surface hydroxylation modified. (2) Self-Assembled Monolayer (SAM) deposition. (3) SAM surface functionalization and deprotonation. (4) Catalytic seed fixed. (5) Electroless deposition of Co-alloy barrier layers. (6) Electroless deposition of Cu wires and (7) Co-alloy capping layers deposition by electroless plating on dielectric layers. First, the leakage currents and dielectric constants of the BD III surface hydroxylated by SC-1 solution were measured with the dielectric properties (J-E, C-V), and using attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR) to evaluate the surface bonding changes and hydroxylation effects. According to the results, short-time (10 seconds) modification by SC-1 solution not only achieves hydroxylation effects on BD III, but also causes non-serious damage. After hydroxylation treatment, octadecyltrichlorosilane self-assembled monolayer (OTS-SAM) is deposited on the BD III surface, and the surface is highly hydrophobic. A slight and short-seconds plasma treatment cause the surface becomes hydrophilic. Then, deprotonation by SC-1 solution makes the surface presents negative potential and attracts metal ions, and the metal ions are reduced to the catalytic seed particles fixed on the OTS-SAM for the subsequent electroless Co-alloy barrier layers deposition. Electroless plating Cu wires can easily deposited on Co-alloy surface, according to Co-alloy self-catalytic effect. In order to increase the reliability of Cu wires, this study adopts electroless plating homogeneous metal as capping layers, that is, Cu wires are capped by Co-alloy capping layers. Adding the strong reducing agent into Co-alloy plating solution, Co-alloy capping layers can be precipitated on the Cu wires to achieve a completely capped effect. Finally, a constant current stress is applied to the Cu wires which are uncapped and capped by Co-alloy, to measure the difference in reliability. It is confirmed by the measurement results that Co-alloy capping layers can prolong the electromigration life of Cu and greatly increase the reliability of Cu wires.
Hopkins, Benjamin Thomas. "Collective Resonances in Nanoparticle Oligomers." Phd thesis, 2017. http://hdl.handle.net/1885/127379.
Повний текст джерела"A Novel Methodology To Classify The ADSS Cable Ranking." Master's thesis, 2011. http://hdl.handle.net/2286/R.I.9426.
Повний текст джерелаDissertation/Thesis
M.S. Electrical Engineering 2011
Ge, Yang. "Printed Charge Storage Capacitor." Doctoral thesis, 2017. https://tud.qucosa.de/id/qucosa%3A30865.
Повний текст джерела