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Dissertations / Theses on the topic 'Non linear optical material'

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1

Wallace, Paul M. "Microscopy studies of non-linear optical materials /." Thesis, Connect to this title online; UW restricted, 2005. http://hdl.handle.net/1773/8525.

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2

Scheidt, Torsten. "Non-linear optical diagnostics of non-centrosymmetric opto-electronic semiconductor materials." Thesis, Stellenbosch : University of Stellenbosch, 2006. http://hdl.handle.net/10019.1/17332.

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3

Hou, Wenbo. "Crystal growth of an organic non-linear optical material from the vapour phase." Thesis, University of Strathclyde, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366941.

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4

McEwan, Kennneth John. "Mechanisms for non-linear optical behaviour in molecular fluids." Thesis, University of Oxford, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305473.

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5

Shi, Yanrong. "Squaraine dyes for non-linear optics and organic electronics." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/44720.

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This dissertation describes the investigation of the synthesis and characterization of new squaraine-based photonic and electronic materials. In the first part of this thesis, squaraine dyes with large conjugation systems, including extended squaraines consisting of bis(donor)substituted vinylene-heterocycles and bis(indolinylenemethyl)squaraine-based oligomers linking through different π-bridges were designed, synthesized and characterized to exhibit strong two-photon absorption (2PA) for femotosecond and nanosecond optical-power limiting applications in the near-infrared (NIR). One of the de
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6

Hill, Jonathan P. "Novel porphyrins as potential non-linear optical and electronic materials." Thesis, Brunel University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.260506.

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7

Turner, Michael James. "Crystallographic and computational studies of organic non-linear optical materials." Thesis, Durham University, 2007. http://etheses.dur.ac.uk/2447/.

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This thesis presents work on the determination of both linear and non-linear optical properties of organic molecular crystals from high-resolution X-ray diffraction data. The eventual goal of this work is to obtain accurate and reliable estimates of the non-linear optical properties for these materials of proven technological importance and to further our understanding of the factors affecting the relationship between molecular structure and macroscopic properties in order to aide our quest in designing new and better non-linear optical materials. The basic theory of crystallography is discuss
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8

Lamberth, Curt. "Design of non-linear optical materials based on inorganic compounds." Thesis, University of Oxford, 1992. http://ora.ox.ac.uk/objects/uuid:371027ea-771e-495b-96b1-ee35247fe693.

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This Thesis is concerned with the prediction, synthesis, characterization and testing of inorganic materials for Second Harmonic Generation (SHG). Chapter One describes the fundamentals of non-linear optics, and poses the problems, and some of their solutions which confront the synthetic chemist and the theoretical prediction of the second order hyperpolarizability constant β using CNDOVSB calculations. Chapter Two describes the design, implementation and calibration of an apparatus for measurements of the second harmonic generating efficiency of solids based on the Kurtz powder technique, and
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9

Sturm, Chris, Marcel Wille, Jörg Lenzner, Sherzod Khujanov, and Marius Grundmann. "Non-linear optical deformation potentials in uniaxially strained ZnO microwires." American Institute of Physics, 2017. https://ul.qucosa.de/id/qucosa%3A23556.

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The emission properties of bent ZnO microwires with diameters ranging from 1.5  μm to 7.3  μm are systematically investigated by cathodoluminescence spectroscopy at T ≈ 10 K. We induced uniaxial strains along the c-axis of up to ±2.9 %. At these high strain values, we observe a nonlinear shift of the emission energy with respect to the induced strain, and the magnitude of the energy shift depends on the sign of the strain. The linear and non-linear deformation potentials were determined to be D1=−2.50±0.05 eV and D2=−15.0±0.5 eV, respectively. The nonlinearity of the energy shift is also refle
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10

Pan, Lin. "Linear and Nonlinear Optical Microscopy of Layered Materials at Nanoscale." Electronic Thesis or Diss., Troyes, 2023. http://www.theses.fr/2023TROY0009.

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Les techniques de caractérisation optique en tant qu'outils ultrasensibles et non destructifs, en révélant l'influence de la structure locale sur les propriétés optiques des couches semi-conductrices bidimensionnelles, ont fait l'objet d'une large attention. Dans cette thèse, la microscopie confocale à balayage maison avec un miroir parabolique est utilisée pour caractériser et comprendre la dépendance des propriétés structurelles des propriétés optiques linéaires et non linéaires des couches semi-conductrices bidimensionnelles. Les caractérisations structurelles des matériaux en couches sont
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11

Rai, Rachel H. "Synthesis and Characterization of Graphene Based Composites for Non-Linear Optical Applications." University of Dayton / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1461600917.

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12

Jiang, Quanzhong. "Crystal growth and characterisation of mixed niobates for non-linear optical applications." Thesis, University of Strathclyde, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366805.

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13

Shepherd, Paul David. "The synthesis and possible non-linear optical second harmonic generation of some organosilicon materials." Thesis, University of Sussex, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.385998.

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14

Rees, Robert Douglas. "The synthesis of novel porphyrin macrocycles for their use as potential non-linear optical materials." Thesis, Brunel University, 1999. http://bura.brunel.ac.uk/handle/2438/5776.

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The potential organic molecular compounds exhibit for the use as nonlinear optical materials, has received a lot of attention recently. Aromatic compounds containing extensive delocalised π-electronic systems are of particular interest. Porphyrins and metalloporphyrins contain an extensive delocalised 7t-electron system and are amongst those compounds of interest. The ability to manipulate the porphyrins peripheral substitution pattern has led to the synthesis of a range of novel porphyrin macrocycles. A series of meso- substituted porphyrin macrocycles ha been synthesised and the non-linear o
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15

Tordin, E. "SYNTHESIS AND CHARACTERIZATION OF NEW ORGANIC MOLECULES AND INORGANIC-ORGANIC HYBRID MATERIALS WITH INTERESTING LINEAR AND SECOND ORDER NON LINEAR OPTICAL PROPERTIES." Doctoral thesis, Università degli Studi di Milano, 2010. http://hdl.handle.net/2434/150222.

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The different stages of technological evolution are characterized in terms of the dominant type of tools used in each of them. We passed through the `stone age', the `copper age' and the `iron age' and now we are probably in the `electron age'. After having done a wonderful job, today it looks as if electronic technologies have started experiencing their limits. For example, today's `information explosion' and communication problems demand very large bandwidths without cross talk, larger than that electronics can provide. What could be the technology that can tackle the growing needs of tomorr
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16

Kanuga, Karnav D. "A FUNDAMENTAL STUDY ON THE NON-LINEAR MECHANO-OPTICAL BEHAVIOR OF POLYETHYLENE NAPHTHALATE, ITS BLENDS WITH POLYETHERIMIDE AND ITS NANOCOMPOSITES." University of Akron / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=akron1138038431.

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17

Pritula, I. M., O. N. Bezkrovnaya, A. G. Plaksyi, Y. L. Slominsky, A. V. Lopin, and A. D. Kachkovskiy. "Composite Materials on the Base of Nanoporous SiO2 Matrices with Polymethine Dyes Molecules." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35594.

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Sol-gel SiO2 matrices with Polymethine dyes (РМ1, РМ2 and РМ3) were synthesized using citric acid as a catalyst. There were measured the absorption and luminescence spectra of РМ1, РМ2 and РМ3 dyes (with a concentration of 1·10–5 mole/dm3) in different solvents (ethanol, dimethylformamide, formamide and water) and in sol-gel SiO2 matrices. The said dyes were found to be present in monomeric form in ethanol, dimethylformamide and formamide. PM1 dye did not form dimers in water and in matrices and retained its color. PM2 and PM3 dyes aggregated into the network of SiO2 matrices and in water
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18

Santos, Alexandre Bozolan dos. "Dispositivos baseados no preenchimento de fibras de cristal fotônico por líquidos e materiais nanoestruturados." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/18/18155/tde-06062012-112247/.

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Esta tese descreve a demonstração experimental de dispositivos baseados em fibras de cristal fotônico (PCFs), que aproveitam a flexibilidade estrutural oferecida pela matriz de capilares que compõe a seção reta da fibra, de forma a preencher estes capilares com líquidos e materiais nanoestruturados. Para o caso de materiais nanoestruturados, uma vez preenchida a fibra, os materiais nela inseridos interagem eficientemente com a luz guiada. Essa arquitetura diferenciada em relação às fibras ópticas convencionais abre novas perspectivas no desenvolvimento de aplicações como óptica não-linear e se
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19

Chaitanya, Kumar Suddapalli. "High-power, fiber-laser-pumped optical parametric oscillators from the visible to mid-infrared." Doctoral thesis, Universitat Politècnica de Catalunya, 2012. http://hdl.handle.net/10803/83528.

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High-power, continuous-wave (cw), mid-infrared (mid-IR) laser sources are of interest for variety of applications such as trace gas detection and remote sensing, which require broad spectral coverage to address the most prominent absorption features of a wide range of molecular species particularly in the mid-IR fingerprint region. On the other hand, surgical applications require high energy sources with unique pulse structure at specific wavelength in the mid-IR ranging from 6-6.5 m. Optical parametric oscillators (OPOs) offer potential sources for all the above applications. The outp
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20

Benard, Hervé. "Réalisation et caractérisation non linéaire de guides d'ondes en polymères organiques en vue d'applications photoniques." Grenoble INPG, 1996. http://www.theses.fr/1996INPG0085.

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Des guides d'ondes en polymeres organiques greffes (pmma-dr1 et pmma-pna) ont ete realises en vue d'applications photoniques. Entre autres, une technique originale, que nous avons etudiee, a ete utilisee pour la fabrication de guides confines en pmma-dr1 : c'est le photoblanchiment par laser argon. L'etude des proprietes optiques lineaires et non lineaires des guides realises a donne des resultats encourageants. Le taux de couplage du faisceau incident dans le guide se situe typiquement entre 10 et 20% et les pertes par propagation sont comprises entre 2 et 4db/cm pour des guides monomodes, au
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21

Nayyar, Iffat. "Prediction of Optical Properties of Pi-Conjugated Organic Materials for Technological Innovations." Doctoral diss., University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5993.

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Organic ?-conjugated solids are promising candidates for new optoelectronic materials. The large body of evidence points at their advantageous properties such as high charge-carrier mobility, large nonlinear polarizability, mechanical flexibility, simple and low cost fabrication and superior luminescence. They can be used as nonlinear optical (NLO) materials with large two-photon absorption (2PA) and as electronic components capable of generating nonlinear neutral (excitonic) and charged (polaronic) excitations. In this work, we investigate the appropriate theoretical methods used for the (a)
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22

Moog, Luc. "Étude expérimentale et théorique de la susceptibilité optique non linéaire de génération de troisième harmonique du cristal de para-aminobenzonitrile." Grenoble 1, 1995. http://www.theses.fr/1995GRE10234.

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Dans ce memoire, nous avons etudie le triplage de frequence optique (generation de troisieme harmonique) sur un cristal organique de 4-aminobenzonitrile (abn) constitue de molecules de type donneur/accepteur. Dans un premier temps, nous avons fait croitre des cristaux massifs d'abn (quelques millimetres d'epaisseur) par une technique classique de bridgman et des cristaux minces d'abn (quelques dizaines de microns) par une technique de croissance rarement employee pour les cristaux organiques: la sublimation sous gaz inerte. Ces deux methodes ont donne des cristaux permettant de faire des exper
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23

Ferdi, Nawal. "Croissance de fibres cristallines et de cristaux massifs pour les processus de conversion de fréquences aux longueurs d’ondes VUV : application aux borates." Electronic Thesis or Diss., Université de Lorraine, 2022. http://www.theses.fr/2022LORR0378.

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L'idée d'utiliser des cristaux à propriétés non linéaires pour la conversion de fréquences et la génération de nouvelles sources laser dans le domaine UV ne cesse de se développer. Parmi ces cristaux, la famille des borates est très utilisée et très mentionnée dans la littérature aussi bien pour ses propriétés optiques (large domaine de transparence, grande biréfringence, grand coefficient de dommage optique...) que pour sa diversité chimique. Le méta-borate de baryum β-BaB2O4 (β-BBO), et le borate de lithium et de strontium Li4Sr(BO3)2 (LSB) font partie de cette famille de matériaux et sont t
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24

Koch, Frank. "Linear and non-linear measurements in optical fibres." Thesis, Imperial College London, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.399244.

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25

Holmes, Melanie Jane. "Design of non-linear optical fibres." Thesis, University of Cambridge, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.259441.

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26

Morgenthaler, Michael J. E. "Non-linear optical studies of surfaces." Thesis, Heriot-Watt University, 1993. http://hdl.handle.net/10399/1430.

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27

Murdin, Benedict Neil. "Magneto-optical and non-linear optical spectroscopy of semiconductors." Thesis, Heriot-Watt University, 1993. http://hdl.handle.net/10399/1450.

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28

Womersley, Martin Nigel. "Linear and non-linear optical properties of electro-optic crystals." Thesis, University of Warwick, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263787.

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29

Lawrence, Heather Bunting Elizabeth. "Organometallic compounds with non-linear optical properties." Thesis, University of Oxford, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.276835.

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30

Akelaitis, Andrew J. P. "Advanced non-linear optic chromophores and dendritic molecules for optimizing electro-optic materials properties /." Thesis, Connect to this title online; UW restricted, 2006. http://hdl.handle.net/1773/11537.

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31

Chateau, Denis. "Etude de l'influence de la structure et de la composition de matériaux hybrides monolithiques sur les propriétés optiques (luminescence et absorption non-linéaire)." Phd thesis, Ecole normale supérieure de lyon - ENS LYON, 2013. http://tel.archives-ouvertes.fr/tel-00863807.

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Le procédé sol-gel permet la réalisation de matériaux optiquement performants et la possibilité d'intégrer diverses molécules dans ces systèmes ouvre les portes à des applications dans de nombreux domaines. Nous nous sommes intéressés en particulier à la réalisation de matériaux sol-gel monolithiques, fortement dopés avec des molécules actives, dans le cadre de la réalisation de limiteurs optiques performants dans le visible et dans l'infrarouge.La mise au point de procédés et de matrices sol-gel compatibles avec divers types de chromophores a tout d'abord été effectuée. Une investigation des
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32

Cronstrand, Peter. "Quantum chemical calculations of non-linear optical absorption." Doctoral thesis, KTH, Biotechnology, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3766.

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<p>This thesis represents a quantum chemical treatise ofvarious types of interactions between radiation and molecularsystems, with special emphasis on the nonlinear opticalprocesses of Multi-Photon Absorption and Excited StateAbsorption. Excitation energies, transition dipole moments,two-photon and three-photon tensor elements have beencalculated from different approaches; density functional theoryand<i>ab-initio</i>theory, employing different orders ofcorrelation treatment with the purpose to provide accuratevalues as well as evaluate the quality of the lower ordermethods. A combined study of
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33

Stone, Peter Jeffrey William. "Langmuir-Blodgett films for non-linear optical applications." Thesis, Coventry University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.259613.

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34

MacKenzie, Harry Straghan. "Evanescent-field devices for non-linear optical applications." Thesis, University of Cambridge, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358807.

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35

Afroozi, Milani Mohammad. "Non-linear analysis of optical and microwave sources." Thesis, University of Birmingham, 2016. http://etheses.bham.ac.uk//id/eprint/6675/.

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Due to the ever increasing need for better and more capable communication systems, a large quantity of research is focused on the design and simulation of different sections of communication systems including the communication sources. Due to the massive cost of the fabrication involved in designing new communication sources, the accurate modelling and design of these sources using Computer Aided Design is of great interest. In this thesis fundamentals of laser modelling and nonlinear microwave antenna design; followed by reviewing the most important works carried out by other researchers in t
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36

Nixon, Gregor Clark. "Coherent non-linear optical processes in quantum wells." Thesis, University of Cambridge, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.627327.

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37

KARIMAN, BEHJAT SADAT. "Non-Linear Optical Process for Label-Free Nanoscopy." Doctoral thesis, Università degli studi di Genova, 2022. http://hdl.handle.net/11567/1090684.

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Optical microscopy is one widely used tool to study morphological and functional characterization of the observed, typically fluorescent-labeled specimen. Since labels may perturb the function of biomolecules, a recent challenge in bioimaging is to provide label-free imaging of complex biological systems in real-time and non-invasive mode. Investigating the structure of complex biological systems typically demands high speed, sensitivity, spectral and multi-contrast capability, temporal and spatial resolution. The demand of multimodal label-free imaging calls for developing a microscope that c
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38

Neal, D. B. "Langmuir-Blodgett films for non-linear optics." Thesis, Durham University, 1987. http://etheses.dur.ac.uk/9527/.

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In recent years there has been considerable interest in media which display significant non-linear optical properties; the telecommunications industry may exploit chin films of such materials for signal processing applications. The Langmuir-Blodgett (LB) technique provides a means of depositing organic layers of a precisely defined thickness. Moreover, by alternating layers of different materials, supermolecular arrays may be fabricated in which there is no centrosymmetry, and therefore the second-order non-linearity of the constituent molecules may be exploited. An investigation of the proper
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39

van, der Kolk Jarno Nicolaas. "Theory of Image Formation in Non-linear Optical Microscopy." Thesis, Université d'Ottawa / University of Ottawa, 2017. http://hdl.handle.net/10393/36650.

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Nonlinear optical microscopy is a collection of very powerful imaging techniques. Linear optical microscopes probe the refractive index and absorption, which both stem from the first-order linear electric susceptibility. Especially in biological tissue, the variation in the refractive index is often small and the tissue is, in many cases, transparant. Nonlinear optical microscopes on the other hand probe the nonlinear higher-order susceptibilities, which can be chemically sensitive, leading to the capability to achieve label-free imaging. Nonlinear optical microscopes have been in developme
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40

Mayo, Sheridan Clare. "The structure and properties of non-linear optical crystals." Thesis, University of Oxford, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.306883.

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41

Sutton, Richard. "Non-linear optical characterisation of single-walled carbon nanotubes." Thesis, University of Surrey, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.494200.

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This thesis reports the measurement of non-linear optical properties of single-walled carbon nanotubes (SWNTs). We report results of 'Z-scan', pump-probe and spectrally resolved pump-probe experiments, each of which reveals different aspects of the interesting non-linear optical behaviour of this novel material.
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42

Kalli, Kyriacos. "Investigation of linear and non-linear optical phenomena using high finesse ring resonators." Thesis, University of Kent, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.314457.

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43

Willmott, Jonathan Raffe. "Linear and non-linear optical properties of highly twisted chiral nematic liquid crystals." Thesis, University of Southampton, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.408981.

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44

McCallum, D. S. "Linear and non-linear optical methods for the detection of OH in flames." Thesis, Imperial College London, 1988. http://hdl.handle.net/10044/1/47179.

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45

Biris, C. G. "Computational studies of linear and non-linear optical properties of nano-structured metamaterials." Thesis, University College London (University of London), 2011. http://discovery.ucl.ac.uk/1334085/.

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In this thesis, a comprehensive analytical and numerical study of optical non-linear effects in plasmonic metamaterials is presented. The new results reported and described in this work can potentially have a significant impact on our understanding of electromagnetic phenomena in artificial optical materials, and facilitate the design and fabrication of new active optical devices with new or enhanced functionality. Equally important, these results could lead to deeper physical insights into the fundamental properties of these metamaterials. To this end, a new analytical formalism based on the
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46

Nicolaou, N. "Single and two-photon fluorescence studies of linear and non-linear optical chromophores." Thesis, University College London (University of London), 2008. http://discovery.ucl.ac.uk/1444335/.

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The subject matter presented in this thesis concerns the structural and dynamic studies of new fluorescent probe molecules and the application of polarised fluorescence techniques and analysis to molecular motion, order and solvation in a highly ordered environment. Chapter 1 reviews recent group research providing a context to the work in this thesis, whilst Chapters 2 and 3 concern the study of fluorescent probe dynamics. Time resolved photoselection techniques were used to probe the order and full angular motion of Coumarin 6 and Coumarin 153 in the nematic and isotropic phases of the liqui
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47

Ajward, Ahamed Milhan. "Linear and non-linear optical properties of OMBD grown PTCDA and Alq3 films." University of Cincinnati / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1331060164.

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48

Garbin, Eleonora. "Electronic interactions in molecular dimers revealed by linear and non-linear optical properties." Doctoral thesis, Università degli studi di Padova, 2011. http://hdl.handle.net/11577/3421995.

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Aim of the research project is the investigation of the role played by molecular interactions on the linear and non-linear optical properties in dimeric structures. In particular the two-photon absorption and the excited state dynamic in different dimeric structures is studied, in order to observe to which extent dimerization affects the photophysic of the molecules. The work is focused on three classes of molecules: i) charge transfer (CT) dimers of the radical cation of tetrathiafulvalene (TTF), ii) molecular dimers of dipolar and quadrupolar molecules, and iii) chemically linked dimers of
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49

Oliver, Andrew 1975. "The sequential insertion of carbon monoxide and non-linear optical chromophores into palladium-carbon bonds : a novel route to non-linear optical polyketones." Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=31283.

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This thesis presents a new approach to generating nonlinear optical side-chain polymers. By functionalizing olefins with nonlinear optical (NLO) chromophores and using late transition metal insertion catalysts of the form (bipy)Pd(CH 3)+ X- (X = OTf or BArF- ), a series of NLO materials were synthesized. These novel NLO polyketones were produced in modest yields with excellent polydispersities and good thermal stabilities via the alternating insertion of CO and NLO-tethered olefin into the palladium-carbon bond of the catalyst. A variety of NLO insertion monomers were examined during this stud
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50

Price, Daniel James. "Hydrogen-bond induced mesomorphism in heteromeric systems and studies towards optically non-linear organometallic materials." Thesis, University of Sheffield, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296759.

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