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Thesis (Ph. D.)--University of Texas at Austin, 2007. / Vita. Includes bibliographical references.

Thesis (Ph. D.)--University of Washington, 2005. / Vita. Includes bibliographical references (leaves 134-145).

No description available.

Chen Ji = 由純淨有機物質及其混合物產生的具有退極化性質的超瑞利散射的光譜研究 / 陳佶. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2004. / Includes bibliographical references (leaves 91-92). / Text in English; abstracts in English and Chinese. / Chen Ji = You chun jing you ji wu zhi ji qi hun he wu chan sheng de ju you tui ji hua xing zhi de chao Ruili san she de guang pu yan jiu / Chen Ji. / Abstract --- p.i / Chhiese Abstract --- p.ii / Acknowledgments --- p.iii / Table of Contents --- p.iv / List of Figures and Tables --- p.vii / Chapter Chapter 1 --- Introduction --- p.1 / Chapter Chapter 2 --- Basic Theory --- p.5 / Chapter 2.1 --- A brief introduction to nonlinear optics --- p.5 / Chapter 2.2 --- Second Harmonic Generation (SHG) --- p.7 / Chapter 2.3 --- Hyper Rayleigh Scattering (HRS) --- p.9 / Chapter 2.4 --- Comparison between Second Harmonic Generation and Hyper Rayleigh Scattering --- p.10 / Chapter 2.5 --- HRS signal from a liquid --- p.12 / Chapter 2.6 --- Methods for measuring hyperpolarizability βby HRS --- p.13 / Chapter 2.7 --- Theoretical description of the depolarization ratio in HRS for a rod-like molecule --- p.16 / Chapter 2.8 --- Organic molecules with strong quadratic nonlinearities --- p.20 / Chapter Chapter 3 --- Experimental Setup --- p.25 / Chapter 3.1 --- Introduction --- p.25 / Chapter 3.2 --- Detailed descriptions of the main componets --- p.27 / Chapter 3.2.1 --- Laser system --- p.27 / Chapter 3.2.2 --- Scattered light collection system --- p.29 / Chapter 3.2.3 --- Data acquisition system --- p.32 / Chapter 3.3 --- Basic performance tests of the experimental setup --- p.35 / Chapter 3.3.1 --- Temporal stability of the apparatus --- p.35 / Chapter 3.3.2 --- Linearity of the light detection apparatus --- p.36 / Chapter 3.3.3 --- Background noise --- p.38 / Chapter 3.4 --- Sample preparation --- p.40 / Chapter Chapter 4 --- General spectral measurements and measurement of hyperpolarizability β for some organic chemicals --- p.41 / Chapter 4.1 --- Low and high resolution HRS spectra of several common liquids --- p.41 / Chapter 4.2 --- Experimental performance test of HRS by using PNA solution --- p.45 / Chapter 4.3 --- Measurements of the first order hyperpolarizability b for Crystal Violet (CV) by a modified Internal Reference Method (IRM) --- p.50 / Chapter 4.3.1 --- Basic spectral measurement of CV --- p.50 / Chapter 4.3.2 --- Measurement of hyperpolarizability β for CV --- p.52 / Chapter Chapter 5 --- Study of coherent and incoherent hyper-Rayleigh scattering for organic chemicals --- p.57 / Chapter 5.1 --- Introduction --- p.57 / Chapter 5.2 --- Calibration of the experimental setup --- p.59 / Chapter 5.3 --- "Study of depolarization ratio of PNA solution, Nitrobenzene and CCl4" --- p.64 / Chapter 5.4 --- Further study of depolarization ratio for Nitrobenzene and its mixtures --- p.68 / Chapter 5.5 --- More studies on depolarization ratios for CC14 and Nitrobenzene --- p.79 / Chapter 5.6 --- "Spectral study of PNA solution, Nitrobenzene and its mixtures" --- p.83 / Chapter 5.7 --- Summary --- p.85 / Chapter Chapter 6 --- Conclusions --- p.88 / References --- p.91

Thesis (P.D.)--University of Wisconsin--Madison, 1984. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 248-258).

The filtered Rayleigh scattering (FRS) optical diagnostic has become an attractive technique for advanced aerodynamic measurements. The appeal of FRS is that it can simultaneously quantify density, temperature, and vector velocity. Additionally, it is entirely non-intrusive to the flow since the technique leverages how laser light scatters off of molecules naturally present in the gas. Acquired FRS data considered herein is in the form of a frequency spectrum. To process this data, a measurement model for the FRS spectrum is used, where inputs to this model are the flow field quantities of interest and the output is a representative FRS spectrum. An iterative procedure on these quantities is performed until the model spectrum matches the measured spectrum. However, as observed in certain applications of this technique, there is a range of measurement configurations where the standard methods to model this spectrum do not agree with measured spectra, even at known flow conditions. This disagreement causes large bias uncertainties in determined flow field quantities. This work leverages a data-driven approach to diagnose this disagreement by utilizing an extensive FRS database. Data analysis indicates that the widely used Tenti S6 model for the Rayleigh scattering lineshape is invalid in certain operating regions. A new Rayleigh lineshape modeling methodology, the Cabannes model, is introduced that vastly improves the agreement between measured and modeled FRS signals. Analysis of the Cabannes model indicates that one only needs to use this modeling methodology for FRS and not laser Rayleigh scattering (LRS). This improved measurement model can be used to mitigate bias uncertainties, and, in turn, improve the reliability of the FRS optical instrument. / Doctor of Philosophy / The filtered Rayleigh scattering (FRS) laser-based measurement technique has become an attractive tool for aerodynamic measurements. Leveraging the theory of Rayleigh scattering, measuring how laser light scatters off of air molecules can be used to determine the temperature, density, and velocity of the air. A specific combination of temperature, density, and velocity results in a unique, measured FRS signal. A computational model of this FRS signal is then used to go from FRS signal to those three quantities of interest. However, as observed by certain applications of this technique, there is a certain range of measurement cases where the standard methods to model this signal do not agree with measured signals at known values for temperature, density, and velocity of the air. This disagreement between modeled and measured signals causes large errors, and, therefore, decreases the reliability of this measurement for those cases. This work analyzes an extensive FRS database to determine the source of this disagreement. The conclusion from this data analysis is that the widely used computational model in the community is not correct for certain applications of this FRS measurement. A new method to model FRS signals is proposed in this work, which vastly improves the agreement between measured and modeled signals. This improved computational model can be used to remove the large errors seen in this FRS measurement system that were previously caused by modeling errors. This, in turn, will improve the reliability of this technique across the whole application space of applied aerodynamic measurements.

by Cheung Ka Wing = 由有機物質發放的超瑞利散射的光譜性硏究 / 張家榮. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2000. / Includes bibliographical references (leaves 94-95). / Text in English; abstracts in English and Chinese. / by Cheung Ka Wing = You you ji wu zhi fa fang de chao rui li san she de guang pu xing yan jiu / Zhang Jiarong. / Title Page --- p.i / Acknowledgments --- p.ii / Abstract --- p.iii / Chinese Abstract --- p.iv / Table of Contents --- p.v / Chapter Chapter 1 --- Introduction --- p.1 / Chapter 1.1 --- Nonlinear Optics --- p.1 / Chapter 1.2 --- Tensor Properties of the Polarizability --- p.4 / Chapter 1.3 --- Inversion Symmetry --- p.5 / Chapter 1.4 --- Second Harmonic Generation --- p.6 / Chapter 1.5 --- Outline --- p.10 / Chapter Chapter 2 --- Measurement of the First Hyperpolarizability β --- p.11 / Chapter 2.1 --- Scattering by a Single Small Particle --- p.11 / Chapter 2.2 --- Rayleigh Scattering --- p.13 / Chapter 2.3 --- Fluctuation --- p.15 / Chapter 2.4 --- Hyper-Rayleigh Scattering --- p.16 / Chapter 2.5 --- Coherent and Incoherent Optical Processes --- p.16 / Chapter 2.6 --- Difference between Second Harmonic Generation (SHG) and Hyper Rayleigh Scattering (HRS) --- p.17 / Chapter 2.7 --- Measurement of the First Hyperpolarizability β by Electric Field Induced Second harmonic Generation (EFISHG) --- p.20 / Chapter 2.8 --- Measurement of the First Hyperpolarizability β by Hyper-Rayleigh Scattering (HRS) --- p.22 / Chapter 2.9 --- Two-Component System ´ؤ´ؤInternal Reference Method (IRM) and External Reference Method (ERM) --- p.23 / Chapter 2.10 --- Orientation Average of β --- p.25 / Chapter Chapter 3 --- Experimental Setup --- p.29 / Chapter 3.1 --- Detail Description of the Main Components --- p.29 / Chapter A). --- Laser System --- p.29 / Chapter B). --- Monochromator --- p.33 / Chapter C). --- Photomultiplier Tubes (PMT) --- p.36 / Chapter D). --- Photon Counter --- p.37 / Chapter 3.2 --- Layout of the Optical Design and Alignment Procedures --- p.39 / Chapter 3.3 --- Difficulties in the Experiment --- p.42 / Chapter A). --- Alignment --- p.42 / Chapter B). --- Temporal Stability of the Apparatus --- p.43 / Chapter C). --- The Effects of Using Different Sample Cells --- p.47 / Chapter 3.4 --- Sample Preparation --- p.48 / Chapter 3.5 --- Special Interest on the Organic Compounds --- p.49 / Chapter Chapter 4 --- Measurement on p-nitroaniline --- p.52 / Chapter 4.1 --- The Spectrum of Light Signal from pNA --- p.52 / Chapter 4.2 --- Concentration Dependence Measurement --- p.54 / Chapter Chapter 5 --- Measurement of the Hyperpolarizability of a Fluorescence Dye --- p.58 / Chapter 5.1 --- The Spectrum of Light Signal from DANS --- p.58 / Chapter 5.2 --- Design of an Experimental Technique to Measure β of Fluorescence Dyes that is Absorptive at the Second Harmonic --- p.61 / Chapter 5.3 --- Result of the Measurement on DANS --- p.64 / Chapter Chapter 6 --- Studies of the First Hyperpolarizability β of Two New Compounds --- p.74 / Chapter 6.1 --- The New Compounds --- p.74 / Chapter 6.2 --- Measurement on NC1 --- p.75 / Chapter 6.3 --- Measurement on NC2 --- p.79 / Chapter Chapter 7 --- Probing the Molecular Interaction in a Liquid Using HRS --- p.84 / Chapter 7.1 --- The Spectrum of Light Signal from Nitrobenzene --- p.85 / Chapter 7.2 --- The Signal Depolarization Ratio --- p.86 / Chapter 7.3 --- Results of the Depolarization Ratio Measurement on pNA --- p.87 / Chapter 7.4 --- Results of the Depolarization Ratio Measurement on Nitrobenzene --- p.88 / Chapter Chapter 8 --- Conclusions --- p.91 / References --- p.94

by T.W. Chui. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1998. / Includes bibliographical references (leaves 79-81). / Text in English; abstract also in Chinese. / by T.W. Chui. / Titleage --- p.i / Acknowledgments --- p.ii / Abstract --- p.iii / Table of contents --- p.v / Chapter Chapter 1 --- Introduction --- p.1 / Figure Captions --- p.16 / Chapter Chapter 2 --- Meauserment of first hyperpolarizability / Chapter 2.1 --- Electric Field Induced Second Hamonics (EFISH) --- p.21 / Chapter 2.2 --- Hyper-Rayleigh Scattering (HRS) --- p.23 / Chapter 2.3 --- Internal reference method and External reference method --- p.26 / Figure Captions --- p.28 / Chapter Chapter 3 --- Experimental Setup / Chapter 3.1 --- Design of experimental setup --- p.30 / Chapter 3.2 --- Alignment --- p.32 / Chapter 3.3 --- ower --- p.33 / Chapter 3.4 --- Samples --- p.33 / Figure Captions --- p.35 / Chapter Chapter 4 --- Measurement of first hyperpolarizability of selected molecules / Chapter 4.0 --- Introduction --- p.40 / Chapter 4.1 --- Result of spectral study of the scattered signal from CV --- p.43 / Chapter 4.2 --- Result of the first hyperpolarizability of CV --- p.46 / Chapter 4.3 --- HRS measurement with DANS --- p.47 / Figure Captions --- p.51 / Graphs --- p.52 / Tables --- p.57 / Chapter Chapter 5 --- Studies of the depolarization ratio of HRS and fluorescence light from CV / Chapter 5.0 --- Introduction --- p.59 / Chapter 5.1 --- Experimental setup for the measurement of depolarization ratio --- p.60 / Chapter 5.2 --- Measurement of depolarization ratio forNA at 532nm --- p.61 / Chapter 5.3 --- Measurement of depolarization ratio for CV at 532nm --- p.62 / Chapter 5.4 --- Measurement of depolarization ratio for fluorescence light from CV --- p.63 / Figure Captions --- p.68 / Graphs --- p.71 / Tables --- p.75 / Chapter Chapter 6 --- Conclusions --- p.77 / References --- p.79

Abstract The first hyperpolarizability(£]) of five charge-transfer molecules are determined using the hyper-Rayleigh scattering (HRS) technique at two excitation wavelengths : 1064nm and 1907nm. The 1064nm excitation wavelength is derived from a Nd: YAG pulsed laser, and the 1907nm excitation wavelength is obtained by shifting the 1064nm laser light by stimulated Raman scattering of pressurized H2 gas. Four of the five samples contains thiophene and thiazole are synthetized by Prof. Shu Ching-Fong at the National Chiao Tung University (NCTU) and the other sample is synthetized by Prof. Hong, Jin-Long at the National Sun Yat-sen University (NSYSU). The measured £] values are used to calculate the intrinsic molecular hyperpolarizabilities using the two-level model previously developed by Oudar and Chemla. The results are related to molecular structure.