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Thematische Bibliographien / Optical Properties / Dissertationen

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Dissertationen zum Thema „Optical Properties“

Autor: Grafiati

Veröffentlicht am 4. Juni 2021

Zuletzt aktualisiert am 25. Juli 2025

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1

Park, Seung-Han. "Excitonic optical nonlinearities in semiconductors and semiconductor microstructures." Diss., The University of Arizona, 1988. http://hdl.handle.net/10150/184551.

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This dissertation describes the study of excitonic optical nonlinearities in semiconductors and semiconductor microstructures. The main emphasis is placed on the evolution of optical nonlinearities as one goes from bulk to quantum-confined structures. Included are experimental studies of molecular-beam-epitaxially-grown bulk GaAs and ZnSe, GaAs/AlGaAs multiple-Quantum-Wells (MQW's), and finally, quantum-confined CdSe-doped glasses. The microscopic origins and magnitudes of the optical nonlinearities of bulk GaAs and ZnSe were investigated and the exciton recovery time in ZnSe was measured. A c

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2

Urban, Joanna. "Optical and vibrational properties." Thesis, Toulouse 3, 2019. http://www.theses.fr/2019TOU30092.

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Les matériaux bidimensionnels avec une faible symétrie, conduisant à une anisotropie dans le plan des propriétés électroniques et optiques sont particulièrement intéressants du point de vue de l'application. Dans cette thèse, les propriétés optoélectroniques de trois matériaux stratifiés à anisotropie dans le plan, phosphore noir, disulfure de rhénium et franckéite, sont étudiées par spectroscopie optique. Le phosphore noir (BP), avec une structure orthorhombique plissée, présente une anisotropie significative dans le plan et une bande interdite directe qui varie fortement selon le nombre de c

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3

Rochford, Kent Blair. "Linear and nonlinear optical properties of polydiacetylene waveguides." Diss., The University of Arizona, 1990. http://hdl.handle.net/10150/185340.

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The linear and nonlinear optical properties of a spin-coated polydiacetylene, [5,7-dodecadiyn-1,12-diol-bis(n-butoxy-carbonyl-methyl-urethane)], or poly(4BCMU), were measured to predict its performance in all-optical devices at 1.319 μm. Material requirements for all-optical devices were identified and figures-of-merit noted. A two-photon absorption figure of merit was verified by numerical simulation of a waveguide device. The refractive index and waveguide loss in spin-coated poly(4BCMU) films were measured. A photo-induced bleaching was observed, and its effect on linear and nonlinear optic

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4

Li, Qing. "Optical properties of III-nitride semiconductors." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2002. http://hub.hku.hk/bib/B30162488.

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5

Gleeson, H. F. "Optical and electro-optical properties of chiral mesophases." Thesis, University of Manchester, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.383374.

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6

Alshammary, Marzook. "Optical and magneto-optical properties of doped oxides." Thesis, University of Sheffield, 2011. http://etheses.whiterose.ac.uk/2066/.

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This study aimed to understand the optical and magneto-optical properties of pure, transition metals doped, and tin and transition metals co-doped In2O3 thin films grown in various growth conditions, and aimed to investigate the role of the oxygen defect states in every situation. Indium oxide doped with magnetic transition metals is a promising material for spintronics. This study presents results on the magnetic, transport, optical and magneto-optical properties of thin films of pure and transition metal (Fe,Co) doped In2O3 investigated at different transition metal concentrations and at dif

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7

Papapanayotou, I. "Chemical properties and optical properties of carbonaceous particles." Thesis, University of Leeds, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.383288.

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8

Auguié, Baptiste. "Optical properties of gold nanostructures." Thesis, University of Exeter, 2009. http://hdl.handle.net/10036/73955.

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The optical properties of gold in the visible are dominated by the response of the free conduction electrons to light. In gold nanostructures, the surface charge density adopts a configuration that is constrained by the shape of the nanoparticles. As a result, the scattering of light by gold nanoparticles exhibits a resonant response characterised by a strong scattering and absorption in a narrow range of frequencies. The spectral range of this \emph{localised surface plasmon resonance} (LSPR) can be tuned by varying the size and shape of the gold nanoparticle --- the nanoparticles act as nano

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9

Crook, Robert J. "Optical properties of organic waveguides." Thesis, University of Exeter, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.359604.

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10

Zhou, Yuming. "Optical properties of living organisms." Thesis, Open University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301878.

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11

Wan, Wai Man Vivian. "Optical properties of conjugated polymers." Thesis, University of Cambridge, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.621328.

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12

Rosenow, Judith. "Optical Properties of Condensation Trails." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-205659.

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Persistent condensation trails are clouds, induced by the exhaust of an aircraft engine in a cold and ice-supersaturated environment. These artificial ice clouds can both cool and heat the atmosphere by scattering solar radiation and absorbing terrestrial radiation, respectively. The influence of condensation trails on the Earth-atmosphere energy balance and therewith the answer to the question of the dominating process had been mostly approximated on a global scale by treating the condensation trail as plane parallel layer with constant optical properties. Individual condensation trails and t

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13

Khan, Saima Ishfaque. "The optical properties of metamaterials." Thesis, University of Glasgow, 2016. http://theses.gla.ac.uk/7781/.

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This thesis studies the parametric investigation, polarisation dependence and characterization of fishnet structure at near infrared wavelengths. Detailed simulations are performed to understand the behaviour of the structure at near infrared and optical wavelengths. Simulations are performed to obtain negative refractive index of the fishnet structure formed from nanoimprint lithography (NIL) by taking into account the effect of substrate and polymethyl methacrylate (PMMA) beneath it. Two different structures have been designed and fabricated of varying dimensions using NIL and their resonant

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14

González, Ganzábal A. (Alejandro). "Optical properties of leaf replicas." Master's thesis, University of Oulu, 2018. http://urn.fi/URN:NBN:fi:oulu-201808232657.

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In order to fulfill the increasing energy demand, several improvements can be done in already existing means of producing energy. Based on the idea of light harvesting, several main ideas of optimizing natural leaves (or even creating from a master), such as morphology, super-hydrophobity and waterproofing, among others, have been analyzed. Experimentally, it has been shown that by means of applying natural coatings of wax (from bilberry and lingonberry) onto the surface of silicon and PDMS the reflectance varies in the visible spectrum. In the case of silicon the reflectance decreased on a

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15

Lee, Timothy. "Nonlinear properties of optical microfibres." Thesis, University of Southampton, 2013. https://eprints.soton.ac.uk/355529/.

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Glass microfibre waveguides offer an intriguing platform for the investigation of nonlinear effects, due to their high effective nonlinearity which arises from the tight modal confinement down to dimensions comparable to the wavelength of guided light. This thesis presents theoretical and experimental work towards achieving efficient third and second harmonic generation in silica microfibres, as well as in microfibre loop resonators for enhancing the conversion. Since microfibre resonators themselves exhibit interesting nonlinear behaviour, the polarisation dependent properties of microcoil re

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16

Molloy, Peter J. "Optical properties of concentrated dispersions." Thesis, London Metropolitan University, 1986. http://repository.londonmet.ac.uk/2939/.

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Apparatus and methods have been developed to measure the diffuse transmittance T and reflectance R of multiple scattering, concentrated, colloidal dispersions. The variation of R and T with pathlength, wavelength, and concentration has been investigated for non-spherical particles in concentrated dispersions, over a range of pH and surfactant concentrations. Measurements of diffuse transmittance and reflectance required large corrections to be made for the presence of any specular interfaces i.e. windows. These corrections were minimised by developing a bifurcated fibre optic bundle reflectanc

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17

Wang, Jun, and 王俊. "Optical properties of graphene/GaN hybrid structure." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2014. http://hdl.handle.net/10722/206660.

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Optical properties of graphene/GaN hybrid structure were investigated by using a variety of optical spectroscopy techniques including low-temperature photoluminescence (PL) spectroscopy, time-resolved PL (TRPL) spectroscopy, confocal scanning micro-Raman spectroscopy. Single-layer graphene grown by chemical vapor deposition was transferred to GaN epilayer surface, which is verified by the Raman spectrum with a sharp characteristic peak at ~2690 cm-1and a homogeneous Raman image. Three main band-edge emissions including the free exciton A transition (denoted as FXA), the donor bound exciton

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18

LEE, YONG HEE. "ROOM-TEMPERATURE OPTICAL NONLINEARITIES IN GALLIUM-ARSENIDE AND FAST OPTICAL LOGIC GATES." Diss., The University of Arizona, 1986. http://hdl.handle.net/10150/183920.

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This dissertation studies the physics of room-temperature optical nonlinearities in GaAs and their application to the optical logic gates. The microscopic origins of the room-temperature optical nonlinearities in GaAs are investigated experimentally and theoretically. The data of nonlinear absorption measurement are analyzed in the framework of a semiconductor plasma theory in combination with excitation-dependent line broadening. The importance of the plasma screening of the continuum-state Coulomb enhancement and band filling are emphasized for GaAs at room temperature. Optical bistability a

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19

Mohamed, Mona Bakr. "Metallic and semiconductor nanoparticles : synthesis, characterization and femtosecond laser spectroscopic studies." Diss., Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/31057.

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20

Hill, Isiah Jasper Jr. "Synthesis of azodyes and polyurethanes for use as nonlinear optical materials." Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/28930.

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21

Lowry, Curtis Wayne. "Optical nonlinearities in passive and active gallium arsenide with applications to optical switching and laser instabilities." Diss., The University of Arizona, 1993. http://hdl.handle.net/10150/186295.

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Nonlinear optical properties of passive and active semiconductors are investigated experimentally and theoretically. Improvement of switching cycle time in optical nonlinear etalons to 40 ps is demonstrated, and strained-layer InGaAs/GaAs quantum well material is used in an asymmetric etalon to greatly improve switching power and contrast. Coherent energy transfer (CET) induced by injection of an external light field is demonstrated in a GaAs quantum well vertical-cavity surface-emitting laser (VCSEL). The evolution of CET induced asymmetric gain with increasing injected power is investigated

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22

Balasubramanian, Kunjithapatham. "Structural inhomogeneity and anisotropy in optical filters and thin films; applications to optical storage media." Diss., The University of Arizona, 1988. http://hdl.handle.net/10150/184564.

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Optical filters and thin film optical devices play an important role in Science and Industry. Several significant applications have emerged in optics, microelectronics and computer technology. In this work, we study some aspects of their design and applications. One class of optical fibers, known as Christiansen filters, are based on scattering phenomena in suspensions of solid particles in a liquid medium. Some new scattering filters in the visible and the near UV regions and their performance characteristics are reported here. Feasibility to fabricate such optical filters in solid matrix for

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23

Zongo, Sidiki. "Nonlinear optical properties of natural dyes based on optical resonance." Thesis, University of the Western Cape, 2012. http://hdl.handle.net/11394/4635.

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>Magister Scientiae - MSc<br>Recent research shows that the study of optical properties of organic material natural dyes has gained much consideration. The specific functional groups in several natural dyes remain essential for the large nonlinear absorption expressed in terms of nonlinear optical susceptibilities or other mechanism of absorption such as two photon absorption (TPA), reverse saturable absorption (RSA) or intensitydependent refractive index characteristic. In this thesis we highlight the optical limiting responses of selected natural dyes as nonlinear response in the femtosecond

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24

Faber, Dirk Johannes. "Functional optical coherence tomography spatially resolved measurements of optical properties /." [S.l. : Amsterdam : s.n.] ; Universiteit van Amsterdam [Host], 2005. http://dare.uva.nl/document/88794.

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25

Neethling, Pieter. "Determining non-linear optical properties using the Z-scan technique." Thesis, Link to the online version, 2005. http://hdl.handle.net/10019/1135.

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26

Zheng, Changcheng, and 郑昌成. "Nonlinear optical properties of zinc oxide." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2011. http://hub.hku.hk/bib/B47147751.

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27

Cha, Cheol Yong. "Structure-property study of kapton PMDA-ODA polyimide films." Diss., Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/9332.

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28

Craig, Duncan Wilson. "Optical nonlinearities in CdHgTe." Thesis, Heriot-Watt University, 1987. http://hdl.handle.net/10399/1015.

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29

Anderson, Richard M. "Magneto-optical properties of superparamagnetic spinel ferrite nanoparticles." Diss., Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/30027.

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30

Park, Wounjhang. "Optical properties of thin film phosphors." Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/30078.

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31

Hartschuh, Ryan D. "Optical Spectroscopy of Nanostructured Materials." University of Akron / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=akron1195016254.

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32

Thielen, Peter. "Nonlinear optical properties of chalcogenide glasses /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2004. http://uclibs.org/PID/11984.

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33

Rybka, Marcin. "Optical properties of MAX-phase materials." Thesis, Linköping University, Applied Optics, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-60008.

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<p> </p><p><p> </p></p><p><p><p> </p></p></p><p>MAX-phase materials are a new type of material class. These materials are potentiallyt echnologically important as they show unique physical properties due to the combination of metals and ceramics. In this project, spectroscopic ellipsometry in the spectral range of 0.06 eV –6.0 eV was used to probe the linear optical response of MAX-phases in terms of the complexd dielectric function <em>ε(ω) = ε1(ω) + iε2(ω<em>). </em></em>Measured data were fit to theoretical models using the Lorentz and generalized oscillator models. Data from seven differen

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34

Neff, Curtis Wayne. "Optical Properties of Superlattice Photonic Crystals." Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/14108.

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Photonic band gap materials, commonly referred to as photonic crystals (PCs), have been a topic of great interest for almost two decades due to their promise of unprecedented control over the propagation and generation of light. We report investigations of the optical properties of a new PC structure based upon a triangular lattice in which adjacent [i, j] rows of holes possess different properties, creating a superlattice (SL) periodicity. Symmetry arguments predicted and quot;band folding and quot; and band splitting behaviors, both of which are direct consequences of the new basis that con

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35

Yildirim, Hasan. "Nonlinear Optical Properties Of Semiconductor Heterostructures." Phd thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607438/index.pdf.

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The nonlinear optical properties of semiconductor heterostructures, such as GaAsAl/GaAs alloys, are studied with analytic and numerical methods on the basis of quantum mechanics. Particularly, second and third-order nonlinear optical properties of quantum wells described by the various types of confining potentials are considered within the density matrix formalism. We consider a P&ouml<br>schl-Teller type potential which has been rarely considered in this area. It has a tunable asymmetry parameter, making it a good candidate to investigate the effect of the asymmetry on the nonlinear optical

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36

Fischer, Peer. "Nonlinear optical properties of chiral media." Thesis, University of Cambridge, 1999. https://www.repository.cam.ac.uk/handle/1810/265442.

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This thesis concerns nonlinear optical phenomena in liquids and at interfaces. Optical processes are considered in chiral liquids and at chiral surfaces to second order in the applied electric fields, and to third-order in fluids. Time-dependent perturbation theory is used to describe the response of molecules to electromagnetic fields in terms of molecular electric-dipole polarizabilities. The inclusion of phenomenological damping in the sum-overstates expressions for the nonlinear polarizabilities is discussed, both at optical frequencies and in the limit that one or more applied electromagn

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37

Al, Shakhs Mohammed Hashim. "Engineering optical properties using layered metamaterials." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/62525.

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This thesis explores the concept of metamaterials; a fairly recent concept in the literature which has attracted the attention of researchers due to their abnormal electromagnetic properties. We will particularly consider one dimensional version of a metamaterial made of layers. At the first glance, layered metamaterials are simply multi-layer thin films. The distinguishing feature of layered metamaterials is that they usually incorporate metals whereas most thin film structures in the past have only incorporated dielectrics. The immense interest in certain layered configurations of metals an

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38

Shi, Shenlei. "Exciton related optical properties of ZnO." Click to view the E-thesis via HKUTO, 2006. http://sunzi.lib.hku.hk/hkuto/record/B38284881.

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39

Quraishi, Qudsia. "Optical frequency combs: Properties and applications." Connect to online resource, 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3284408.

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40

Bentley, Caroline. "Optical and microwave properties of ferrofluids." Thesis, Bangor University, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.290411.

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41

Shi, Shenlei, and 施申蕾. "Exciton related optical properties of ZnO." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B38284881.

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42

Apostol, Adela. "COHERENCE PROPERTIES OF OPTICAL NEAR-FIELDS." Doctoral diss., University of Central Florida, 2005. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2715.

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Next generation photonics-based technologies will ultimately rely on novel materials and devices. For this purpose, phenomena at subwavelength scales are being studied to advance both fundamental knowledge and experimental capabilities. In this dissertation, concepts specific to near-field optics and experimental capabilities specific to near-field microscopy are used to investigate various aspects of the statistical properties of random electromagnetic fields in the vicinity of optically inhomogeneous media which emit or scatter radiation. The properties of such fields are being characterized

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43

Adderley, B. M. "Nonlinear optical properties of semiconductor superlattices." Thesis, University of Newcastle Upon Tyne, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239137.

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44

Westland, S. "The optical properties of printing inks." Thesis, University of Leeds, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.383339.

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45

Evans, H. I. "The optical properties of oxide bronzes." Thesis, Imperial College London, 1988. http://hdl.handle.net/10044/1/47054.

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46

Błaszczak, Zuzanna. "Optical properties of the vertebrate retina." Thesis, University of Cambridge, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.708798.

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47

Black, Marcie R. (Marcie Rochelle). "The optical properties of bismuth nanowires." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/17594.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2003.<br>Includes bibliographical references (p. 170-177).<br>The optical absorption of bismuth nanowires in the energy (wavenumber) range of 600 - 4000cm-1 is studied. Optical reflection and transmission spectra reveal that bismuth nanowires have a large and intense absorption peak as well as several smaller absorption peaks which are not measured in bulk bismuth. The smaller absorption peaks fit reasonably well to theoretical models for intersubband absorption in bismuth nanowires. T

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48

Zuehlsdorff, Tim Joachim. "Computing optical properties of large systems." Thesis, Imperial College London, 2015. http://hdl.handle.net/10044/1/29208.

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In recent years, time-dependent density-functional theory (TDDFT) has been the method of choice for calculating optical excitations in medium sized to large systems, due to its good balance between computational cost and achievable accuracy. In this thesis, TDDFT is reformulated to fit the framework of the linear-scaling density-functional theory (DFT) code ONETEP. The implementation relies on representing the optical response of the system using two sets of localised, atom centered, in situ optimised orbitals in order to ideally describe both the electron and the hole wavefunctions of the exc

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49

Djalalian, Assl Amir. "Tailoring Properties of Magneto-Optical Crystals." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-199258.

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Magneto-Optic Photonic Crystals (MOPC) used in low dimension lasers whereby acting as Faraday rotators capable of 45o rotation where insertion loos is compensated by photoluminescence effect are of significant interest. In low dimension sensors MOPCs act as optical filters to selectively detect only lights at certain wavelengths. Combined with the photoluminescence effect, sensors may be designed capable of detecting signals with extremely low intensity, thus high quantum efficiency. In this work, MOPC with various Erbium dopant concentration, acting as photoluminescence centre, were modelled

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50

Kuhta, Nicholas Anthony. "The optical properties of multi-scale plasmonic structures and their applications in optical characterization and imaging." Thesis, 2012. http://hdl.handle.net/1957/31106.

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The optical response of metallic structures is dominated by the dynamics of their free electron plasma. Plasmonics, the area of optics specializing in the electromagnetic behavior of heterogeneous structures with metallic inclusions, is undergoing rapid development, fueled in part by recent progress in experimental fabrication techniques and novel theoretical approaches. In this thesis I outline the behavior of four plasmonic material systems, and discuss the underlying physics that governs their optical response. First, the anomalous optical properties of solution-derived percolation films ar

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