LINEAR AND NONLINEAR OPTICAL RESPONSE OF SMALL METALLIC PARTICLES AND ACCELERATED ENERGY TRANSFER OF DONOR AND ACCEPTOR MOLECULES NEAR THE SURFACE OF A SMALL PARTICLE AND A LONG FIBER.
Item
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Title
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LINEAR AND NONLINEAR OPTICAL RESPONSE OF SMALL METALLIC PARTICLES AND ACCELERATED ENERGY TRANSFER OF DONOR AND ACCEPTOR MOLECULES NEAR THE SURFACE OF A SMALL PARTICLE AND A LONG FIBER.
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Identifier
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AAI8708290
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identifier
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8708290
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Creator
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HUA, XIAOMING.
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Contributor
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Joel I. Gersten
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Date
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1987
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Language
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English
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Publisher
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City University of New York.
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Subject
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Physics, Condensed Matter
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Abstract
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In this thesis the following problems have been studied: (a) far infrared absorption of a small metallic particle, (b) second harmonic generation in a small metallic particle, (c) enhanced energy transfer between a donor and acceptor molecule near a small prolate spheroidally shaped particle, (d) enhanced energy transfer between a donor and acceptor molecules near a long fiber.;A classical model has been set up to combine the effects of electrons and acoustic phonons in metals. The ions are treated as an elastic jellium background and the electrons are treated hydrodynamically. The model has been used to calculate the far infrared absorption coefficient of a small metallic particle. The same model is also used to calculate the second harmonic generation of a small metallic particle in the frozen jellium limit. A simple dielectric model is used in the calculations of enhanced energy transfer. The materials of interest in the last two problems are not restricted to be metals.;The electric dipole absorption spectrum of a small metal particle is found to be oscillatory in the far infrared region. The magnetic dipole absorption is found to be stronger than the electric dipole absorption by a factor of 10('2).;The second harmonic generation of a small metal sphere is found to produce quadrupolar radiation as the response to an incident plane wave with positive helicity. The cross section for second harmonic generation has two resonant peaks, one corresponds to the linear dipole resonance, the other to the nonlinear quadrupole resonance.;The enhanced ratio of energy transfer between a donor and acceptor molecule near a spheroidal particle is found to be a function of the frequency and the geometry of the system. When the molecules are inside the "active zone" and the frequency is close to the surface plasmon frequency the enhancement ratio is extremely high.;In a cylindrical configuration the long-range coupling between two molecules is found to be much stronger than the conventional dipole-dipole coupling. An excited surface mode provides a bridge for energy transfer between the two molecules.
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Type
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dissertation
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Source
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PQT Legacy CUNY.xlsx
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degree
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Ph.D.
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Program
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Physics
