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Dissertations / Theses on the topic 'Field enhancement'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Osley, E. J. "Tunable field enhancement in plasmonic nanostructures." Thesis, University College London (University of London), 2013. http://discovery.ucl.ac.uk/1400567/.

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Metallic nanostructures that contain bound geometries will support localised surface plasmon (LSP) resonances if they are illuminated with light of appropriate frequency. These LSP resonances result in a concentration of the electric field of the incident light into a volume which is smaller than the photon wavelength. Certain geometries that support LSP resonances are sensitive to the polarisation of incident light, and the enhanced electromagnetic field can therefore be tuned in situ by adjusting this polarisation. We have investigated polarisation tunable LSP field enhancement by observing,

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2

Grönqvist, Helena. "Vision Enhancement Systems : The Importance of Field of View." Thesis, Linköping University, Department of Computer and Information Science, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-1370.

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<p>The purpose of the project, which led to this thesis, was to investigate the possible effects different horizontal Fields of View (FoV) have on driving performance when driving at night with a Vision Enhancement System (VES). The FoV chosen to be examined were 12 degree and 24 degree FoV, both displayed on a screen with the horizontal size of 12 degree FoV. This meant that the different conditions of FoV also had different display ratios 1:1 and 1:2. No effort was made to separate these parameters. </p><p>A simulator study was performed at the simulator at IKP, Linköping University. Sixteen

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3

Seguin, Guy. "Enhancement of efficiency and accuracy of near-field measurements." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0018/NQ44576.pdf.

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4

Séguin, Guy. "Enhancement of efficiency and accuracy of near-field measurements." Thesis, McGill University, 1997. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=35612.

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This thesis examines the possibility of increasing the speed of Near-Field measurement of an Antenna, by reducing the number of measurement points and by determining the degree of truncation permissible while maintaining a prescribed degree of precision of the reconstructed far-field.<br>The mathematical formulation leading to the near-field to far-field transform is presented in a novel and simpler form to use. Relations are established between the selected area and sampling rate of Near-Field measurement and the accuracy of the Far-Field of an Antenna. The spectral domain of the field is ana

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5

Dücker, Eibe Behrend. "Enhancement Strategies in NMR Spectroscopy." Doctoral thesis, Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2018. http://hdl.handle.net/11858/00-1735-0000-002E-E3E4-9.

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6

Fischer, Janina [Verfasser]. "Near-field mediated enhancement effects on plasmonic nanostructures / Janina Fischer." Mainz : Universitätsbibliothek Mainz, 2012. http://d-nb.info/1019193654/34.

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7

Hearn, Christian Windsor. "Electrically-Small Antenna Performance Enhancement for Near-Field Detuning Environments." Diss., Virginia Tech, 2012. http://hdl.handle.net/10919/49554.

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Bandwidth enhancement of low-profile omnidirectional, electrically-small antennas has evolved from the design and construction of AM transmitter towers eighty years ago to current market demand for battery-powered personal communication devices. Electrically-small antenna theory developed with well-known approximations for characterizing radiation properties of antenna structures that are fractions of the radiansphere. Current state-of-the-art wideband small antennas near kaH1 have achieved multiple-octave impedance bandwidths when utilizing volume-efficient designs. <br />Significant advances

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8

Huang, Danian. "Enhancement of automatic interpretation techniques for recognising potential field sources." Thesis, University of Leeds, 1996. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.719809.

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9

Boddepalli, Srinivasarao. "Enhancement of field emission from multistage structure of carbon nanotube arrays." FIU Digital Commons, 2007. http://digitalcommons.fiu.edu/etd/1708.

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The field emission measurements for the multistage structured nanotubes (i.e., thin-multiwall and single wall carbon nanotubes grown on multiwall carbon nanotubes) were carried out and a low turn-on field of ~0.45 V/ μm, high emission current of 450 μA at a field of IV/μm and a large field enhancement factor of ~26200 were obtained. The thin multiwall carbon nanotubes (thin-MWNTs) and single wall carbon nanotubes (SWNTs) were grown on the regular arrays of vertically aligned multi wall carbon nanotubes (MWNTs) on porous silicon substrate by Chemical Vapor Deposition (CVD) method. The thin-MWNT

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10

Bur, Christian. "Selectivity Enhancement of Gas Sensitive Field Effect Transistors by Dynamic Operation." Doctoral thesis, Linköpings universitet, Tillämpad sensorvetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-114670.

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Gas sensitive field effect transistors based on silicon carbide, SiC-FETs, have been applied to various applications mainly in the area of exhaust and combustion monitoring. So far, these sensors have normally been operated at constant temperatures and adaptations to specific applications have been done by material and transducer platform optimization. In this thesis, the methodology of dynamic operation for selectivity enhancement is systematically developed for SiC-FETs. Temperature cycling, which is well known for metal oxide gas sensors, is transferred to SiC-FETs. Additionally, gate bias

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11

Bocan, Jiri. "Sensitivity enhancement and field-dependent relaxation in singlet nuclear magnetic resonance." Thesis, University of Southampton, 2013. https://eprints.soton.ac.uk/354550/.

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Nitrous oxide (N2O), also known as "laughing" gas, is a well known compound used in medicine as a mild anaesthetic, or in engineering as a powerful oxidizer providing highoutput of engines. Recently, its 15N doubly-labelled isotopologue attracted attention in singlet NMR due to its long singlet relaxation time ranging between 7 minutes, when dissolved in blood, up to 26 minutes in degassed dimethyl sulfoxide (DMSO). Singlet NMR deals with nuclear singlet states, which are exchange antisymmetric quantum states of coupled pairs of spin-1/2 nuclei with zero total nuclear spin quantum number. Thes

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12

Odarenko, E. N., Y. V. Sashkova, and A. A. Shmat’ko. "Localized field enhancement in slow-wave modes of modified Bragg waveguide." Thesis, IEEE, 2017. https://openarchive.nure.ua/handle/document/18123.

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Modified scheme of Bragg reflection waveguide with additional layers between the hollow core and cladding is considered. Dispersion diagrams are calculated on the base of dispersion equations solutions for ordinary and modified Bragg waveguides. Slow-wave regimes are considered for both kinds of structure. Electric field spatial distributions for localized slowwave modes of Bragg reflection waveguide are obtained. It is shown that modified scheme of Bragg waveguide provides the enhanced localization of the surface modes field in the hollow core. Therefore modified Bragg waveguide is t

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13

PUEO, ORTEGA BASILIO JAVIER. "Analysis and enhancement of multiactuator panels for wave field synthesis reproduction." Doctoral thesis, Universitat Politècnica de València, 2008. http://hdl.handle.net/10251/3347.

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Esta tesis aborda el desarrollo y mejora de los altavoces de panel multiexcitados (MAPs) con particular importancia en su aplicación para la reproducción de síntesis de campo (WFS). Los altavoces MAPs pueden usarse como alternativa a las agrupaciones de altavoces dinámicos para WFS con ventajas adicionales. Sin embargo, puesto que los altavoces MAPs son paneles finitos que se excitan en varios puntos de su superficie, existen cuestiones estructurales y geométricas que deben ser tratadas para garantizar que todos los excitadores actúan uniformemente para crear una agrupación de altavoces válida

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14

Ahmad, Syed Waqas. "Combined effect of electric field and surface modification on pool boiling of R-123." Thesis, Brunel University, 2012. http://bura.brunel.ac.uk/handle/2438/6600.

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The effect of surface modification and high intensity electric field (uniform and non – uniform) acting separately or in combination on pool boiling of R-123 is presented in this thesis. The effect of surface modification was investigated on saturated pool boiling of R-123 for five horizontal copper surfaces modified by different treatments, namely: an emery polished surface, a fine sandblasted surface, a rough sandblasted surface, an electron beam (EB) enhanced surface and a sintered surface. Each 40 mm diameter heating surface formed the upper face of an oxygen-free copper block, electricall

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15

Chevaux, Nicolas. "Contributing to enhancement of power field effect transistors for radio frequency applications." Thesis, University of Sheffield, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.632414.

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16

Fernandez, Garcia Roberto. "Simulation and characterization of optical nanoantennas for field enhancement and waveguide coupling." Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/18846.

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Optical antennas are nanostructures designed to efficiently convert free-propagating optical radiation to localized energy and vice versa. They are based on localized surface plasmon resonances (LSPRs) that generally exist in metal nanoparticles (NPs). The excitation of LSPRs can lead to large near field enhancements and to an increase of the near field effective area up to several times the physical cross section of the nanoparticle. These properties can be used to increase the interaction of any object located in their vicinity with free space radiation. In this thesis, we investigate experi

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17

Byambadorj, Tsenguun. "Optimization of the bowtie gap geometry for a maximum electric field enhancement." Thesis, Marquette University, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10242847.

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<p>Optimization of the geometry of a metallic bowtie gap at radio frequency is presented in this thesis. Since the design and fabrication of a plasmonic device (nanogap) at nanoscale is challenging, the results of this study can be used to estimate the best design parameters for nanogap structure. The geometry of the bowtie gap including gap size, tip width, metal thickness, and tip angle are investigated at macroscale to find the maximum electric field enhancement across the gap. This thesis focuses on the simulation portion of a work that consists of experimental and simulation platfor

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18

Narendar, Harish. "A Simulation Study of Enhancement mode Indium Arsenide Nanowire Field Effect Transistor." University of Cincinnati / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1259080514.

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19

Franz, Dominik. "High harmonic generation in crystals assisted by local field enhancement in nanostructures." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS128/document.

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Le but de cette thèse est d’étudier le processus de la génération d’harmoniques d’ordre élevé (HHG, de l’anglais high-order harmonic generation) dans des solides et la possibilité d’augmenter l’efficacité de la génération en exploitant l’exaltation locale du champ incident dans des nanostructures. La HHG dans les gaz est connue depuis plusieurs décennies et a été étudiée en détails, par contre la HHG dans les solides a été démontrée pour la première fois en 2011. Différents processus comme les oscillations interbandes et intrabandes y jouent un rôle fondamental. Le processus exact est toujours

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20

Kwan, Man-chi. "Mobility enhancement for organic thin-film transistors using nitridation method." Click to view the E-thesis via HKUTO, 2006. http://sunzi.lib.hku.hk/hkuto/record/B37181580.

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21

Kwan, Man-chi, and 關敏志. "Mobility enhancement for organic thin-film transistors using nitridation method." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B37181580.

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22

Abdelaal, Mohamed Riad Mohamed. "Electric Field Driven Enhancement of Heat and Mass Transfer to a Liquid Drop." University of Cincinnati / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1321968954.

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23

Subramanian, Rajkumar. "Heat Transfer to a Droplet Translating in an Electric Field." University of Cincinnati / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1108851150.

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24

Malik, Kazim A. "An intelligent portfolio management approach to gas storage field deliverability maintenance and enhancement." Morgantown, W. Va. : [West Virginia University Libraries], 2006. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4833.

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Thesis (M.S.)--West Virginia University, 2006.<br>Title from document title page. Document formatted into pages; contains vii, 105 p. : ill. (some col.) ; map (part col.). Includes abstract. Includes bibliographical references (p. 58-59).

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25

Bur, Christian [Verfasser]. "Selectivity Enhancement of Gas Sensitive Field Effect Transistors by Dynamic Operation / Christian Bur." Aachen : Shaker, 2015. http://d-nb.info/1075437172/34.

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26

Sanyal, Poulomi. "Depth of field enhancement of a particle analyzer microscope using wave-front coding." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=83931.

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In this thesis we present an analytical solution to the problem of improving the depth of field (DOF) of a certain large magnification imaging system with a high numerical aperture (NA), illuminated with an incoherent source of light. As there is a definite trade-off between the focal depth and resolution achievable with such a system, our challenge was to find a system that would achieve both these objectives and at the same time be cost-effective and easy to implement.<br>Our choice of technique therefore was a novel optical wave front manipulation mechanism involving subsequent image

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27

Lin, Jeng-Weei James. "Enhancement of user-experiences in immersive virtual environments that employ wide-field displays /." Thesis, Connect to this title online; UW restricted, 2004. http://hdl.handle.net/1773/10680.

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28

Rethwisch, Michael D., Manuel M. Luna, D. Michael Ramos, Jessica J. Wellman, and Mark Reay. "Field Comparison of Various Plant Growth Enhancement Products on DPL 449BR Cotton, 2005." College of Agriculture, University of Arizona (Tucson, AZ), 2006. http://hdl.handle.net/10150/198197.

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Three plant growth enhancement chemistries (AuxiGro®, ChaperoneTM, HappyGroTM) were evaluated on DPL 449BR cotton during the summer of 2005, Application were made during mid-July to late planted cotton to evaluate and compare effects of these products on cotton growing under severe heat and growth stress to determine if such chemistries could overcome this stress. Two foliar fertilizers were included with two formulations of AuxiGro® to determine if differences associated with these treatments existed. Usage of HappyGroTM = PhotoGroTM resulted in the most fruiting structures/plant while treatm

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29

Moore, Darren C. "Speech enhancement using microphone arrays." Thesis, Queensland University of Technology, 2000. https://eprints.qut.edu.au/36141/1/36141_Moore_2000.pdf.

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This thesis presents a comparative analysis of baseline microphone array speech enhancement techniques that are prominent in current literature. Delay-sum beamforming, sub-array beamforming, near- and far-field superdirectivity, the generalised sidelobe canceller and the adaptive system for microphone-array noise reduction (AivINOR) are evaluated in varying noise conditions and for different array geometries. The effect of complementing each technique with a postfilter is also assessed. A novel beamformer, termed the near-field adaptive beamformer (NFAB), is introduced and then shown to prov

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30

Ouyang, Qiqing Christine. "Physical model enhancement and exploration of bandgap engineering in novel sub-100nm pMOSFETs /." Digital version:, 2000. http://wwwlib.umi.com/cr/utexas/fullcit?p9992880.

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31

Romero, Orellana Fredy Rolando. "Enhancement of plant performance and biochemical constituents in field and hairy root production of Echinacea." [Ames, Iowa : Iowa State University], 2006.

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32

Guo, Luke (Luke W. ). "Enhancement of antimonide-based p-channel quantum-well field effect transistors using process-induced sprain." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/82389.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2013.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 55-57).<br>For decades, the scaling of silicon CMOS has brought impressive growth to the semiconductor industry, as well as a wealth of technological innovations. However, the continued scaling of CMOS devices to the nanometer regime is now threatened by intrinsic limitations to the use of silicon as the channel material. Hence, there is a strong interest in III-V semiconductor materials to replace

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33

Matsui, Motohide. "Enhancement of field-trapping capabilities and mechanical properties of Nd-Ba-Cu-O bulk superconductors." 京都大学 (Kyoto University), 2003. http://hdl.handle.net/2433/148896.

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34

Yi, Congwen. "Reliability study of enhancement-mode AIGaN/GaN HEMT fabricated with fluorine plasma treatment technology /." View abstract or full-text, 2008. http://library.ust.hk/cgi/db/thesis.pl?ECED%202008%20YI.

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35

Martin, John Matthew. "A comprehensive experimental study of a few Ce based compounds exhibiting an enhancement in #gamma# at low temperatures." Thesis, University of Warwick, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263572.

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36

Camporesi, Silvia. "From bench to bedside, to track and field : the context of enhancement and its ethical relevance." Thesis, King's College London (University of London), 2013. https://kclpure.kcl.ac.uk/portal/en/theses/from-bench-to-bedside-to-track-and-field(474eb5e1-e0ee-4f5b-88c4-49e3887e63d0).html.

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This thesis addresses enhancement technologies and their ethical permissibility through a contextual, bottom up approach based on case studies. The first chapter presents various definitions of 'enhancement', arguments for and against, and discusses the therapy/enhancement distinction. The second chapter discusses applying genetic technologies from bendh to bedside, analysing: the objections to reprogenetics grounded in 'eugenics'; and, how pre-implantation genetic diagnosis (PGD) and other embryonic genetic screening techniques, as well as genetic tests sold online directly-to-the-consumer (D

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37

Hua, Xiaoben, and Yuxia Yang. "A Fusion Model For Enhancement of Range Images." Thesis, Blekinge Tekniska Högskola, Sektionen för ingenjörsvetenskap, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-2203.

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In this thesis, we would like to present a new way to enhance the “depth map” image which is called as the fusion of depth images. The goal of our thesis is to try to enhance the “depth images” through a fusion of different classification methods. For that, we will use three similar but different methodologies, the Graph-Cut, Super-Pixel and Principal Component Analysis algorithms to solve the enhancement and output of our result. After that, we will compare the effect of the enhancement of our result with the original depth images. This result indicates the effectiveness of our methodology.<b

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38

Eichel, Rüdiger-Albert. "New concepts in two-dimensional pulse electron paramagnetic resonance spectroscopy : resolution enhancement by magnetic field modulation /." Zürich : [s.n.], 2001. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=14394.

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Thomas, Sebastian [Verfasser], and Peter [Akademischer Betreuer] Hommelhoff. "Interaction-free measurements with electrons and optical field enhancement at nanotips / Sebastian Thomas. Betreuer: Peter Hommelhoff." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2016. http://d-nb.info/1098130715/34.

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Collins, Clare Melissa. "Ordered nanomaterials for electron field emission." Thesis, University of Cambridge, 2017. https://www.repository.cam.ac.uk/handle/1810/270357.

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In the quest for reliable, repeatable and stable field electron emission that has commercial potential, whilst many attempts have been made, none yet has been truly distinguishable as being successful. Whilst I do not claim within this thesis to have uncovered the secret to success, fundamental issues have been addressed that concern the future directions towards achieving its full potential. An exhaustive comparison is made across the diverse range of materials that have, over the past 40-50 years, been postulated and indeed tested as field emitters. This has not previously been attempted. Th

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Wang, Ruonan. "Enhancement/depletion-mode HEMT technology for III-nitride mixed-signal and RF applications /." View abstract or full-text, 2008. http://library.ust.hk/cgi/db/thesis.pl?ECED%202008%20WANG.

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Aizawa, Hirohito, Kazuhiko Kuroki, and Yukio Tanaka. "Strong magnetic field enhancement of spin triplet pairing arising from coexisting 2k_F spin and 2k_F charge fluctuations." American Physical Society, 2008. http://hdl.handle.net/2237/11284.

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Gullapalli, Sai Krishna. "Wave-Digital FPGA Architectures of 4-D Depth Enhancement Filters for Real-Time Light Field Image Processing." University of Akron / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1574443263497981.

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"Field enhancement using noble metal structures." 2012. http://library.cuhk.edu.hk/record=b5549483.

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共振是自然界一個基本物理過程。特別是，在納米尺度上的光頻電磁諧振產生顯著的場增強，提供了一種手段來影響和控制光與物質的相互作用。例如，巨大的場增強使表面增強拉曼散射具有探測單個分子的靈敏度。此外，場增強可以使發光二極體具有更高亮度高，但輸入功率更低。雖然場增強在一些關鍵技術領域大有前途，有許多挑戰仍有待解決。由於場增強是如此強烈地依賴系統的幾可形狀即使稍作修改可以導致大的結果變化，因此理解幾何結構如何影響場增強和可重複的製造這些車前壽是最重要的。因此本論文致力於設計，製造和貴金屬如銀或金的一維結構的表面上生成的場增強特性。<br>首先對s-偏振下一維金屬光栅產生的場增強使用嚴格購合波分析(RCWA) 進行了設計和優化。優化後，在514nm 波長最強的增強因數是9.7 。製作了一維光栅並進行角度相關的反射率測量，實驗結果與理論計算相符。<br>對一種新型利用表面等離子激元的呻吟加強電場的單縫桔構進行了研究。首先利用用衰減全反射搞合在50 納米厚的金屬薄膜上產生sp恥，隨後利用spps 驅動這一狹縫。結果發現縫內場增強至少3 倍於狹縫附近的等離子激元背景。其增強機理用數值和分析的方法進行理論研究。<br>提出了兩種新型的製造高深寬比納米縫隙的簡便方法。一個是在飯有金膜的薄玻璃上製造裂紋，獲得了寬度小於5nm 具有一定平整度的抗縫，通過掃描電子顯微鏡圖像和共焦雙光子發射(CTPE) 光譜

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Boybay, Muhammed Said. "Sensitivity Enhancement of Near Field Probes Using Negative Materials." Thesis, 2009. http://hdl.handle.net/10012/4597.

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In the last decade, design and application of negative materials have been one of the most interesting subjects in the electromagnetic research. The extraordinary properties of double negative (DNG) and single negative (SNG) materials have been studied extensively over this period. In this thesis, one of the unusual properties of negative materials, the evanescent amplification, is used to improve the sensitivity of the near field probes. The effect of placing DNG and SNG layers between the near field probes and the targets are investigated theoretically. A sensitivity definition is introduce

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46

Chung, Meng-Yu, and 鐘孟瑜. "Acoustic Field Enhancement Using a Stereo Headphone." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/47277474427068453102.

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碩士<br>國立中正大學<br>電機工程所<br>98<br>This thesis proposes a technique of acoustic field enhancement under a listening condition using a stereo headphone. This technique is to explore stereo widening and stereo deepening of a sound field. In this work, the critical bands of psychoacoustics are adopted to decrease inter-correlation of stereo channels for stereo widening. Thereby, directions of sound sources are enhanced. Additionally, an immersive sound field is built for good sound image under fair transparency of sound quality. In stereo deepening, the field depth is improved according to phenomena

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YANG, YING-SHENG, and 楊穎昇. "Context-Aware Sound Field Enhancement for Headphones." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/46604396523608511808.

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碩士<br>國立中正大學<br>電機工程研究所<br>101<br>In this thesis, we proposed a technique of context-aware acoustic field enhancement under a listening condition using a stereo headphone. The architecture consists of three parts which are blind audio separation, acoustic field enhancement and virtual bass enhancement. In the blind audio separation system, we use commercial audio tracks’ mixture mathematical characteristics of left and right channels to carry out time-frequency binary mask, and then separate dominate sound (vocal and dialogues) and subordinate sound (incidental music and surrounding sound). In

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Kuo, Po-Chen, and 郭柏辰. "Far-Field Speech Enhancement Technique for Home Environments." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/83073067040149959736.

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碩士<br>國立中正大學<br>電機工程研究所<br>104<br>With the advance of science and technology, replacing characters with voices as the input information for the system is reachable. The voice-input electronic products have been widely applied in recent years. In our life, whether we use telephones, Skype, Siri or sound surveillance system, the main objective of them is to recognize human’s voice clearly. But these communication devices are often disturbed by the environmental noises, and further cause users unable to understand speaker’s content. Thus, to make speaker’s voice more clearly, speech enhancement t

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Harrison, Richard K. 1982. "Mechanisms and applications of near-field and far-field enhancement using plasmonic nanoparticles." Thesis, 2012. http://hdl.handle.net/2152/19462.

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The resonant interaction of light with metal nanoparticles can result in extraordinary optical effects in both the near and far fields. Plasmonics, the study of this interaction, has the potential to enhance performance in a wide range of applications, including sensing, photovoltaics, photocatalysis, biomedical imaging, diagnostics, and treatment. However, the mechanisms of plasmonic enhancement often remain poorly understood, limiting the design and effectiveness of plasmonics for advanced applications. This dissertation focuses on evaluating the mechanisms of plasmonic enhancement and disti

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Smith, Robert Levi. "Terahertz Field Enhancement by Optimized Coupling and Adiabatic Tapering." Thesis, 2014. http://hdl.handle.net/1828/5671.

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Waveguides are desirable components for energy transmission throughout the electromagnetic spectrum. This thesis experimentally examines a thick slot waveguide for THz guiding and field enhancement. The waveguide is machined from planar copper sheets using the novel technique of femtosecond laser micromachining. In-plane photoconductive THz coupling to a thick slot waveguide is demonstrated using Discontinuous Galerkin Time Domain (DGTD) simulation. The results reveal positive implications for broadband low-loss/dispersion transmission lines up to 1.5 THz.<br>Graduate<br>0544<br>0607<br>0756

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