Characterization and relaxation dynamics of the nonlinear optical properties of thiophene-based polymers.
Item
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Title
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Characterization and relaxation dynamics of the nonlinear optical properties of thiophene-based polymers.
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Identifier
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AAI9820539
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identifier
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9820539
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Creator
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Harris, David Lindel.
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Contributor
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Adviser: Roger Dorsinville
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Date
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1998
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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, Optics | Chemistry, Polymer | Engineering, Electronics and Electrical
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Abstract
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Conjugated polymers are fast becoming more complex with greater potential for a host of important effects such as light emission and detection. They can also be processed at room temperature and coated virtually on any surface.;In this thesis, picosecond and femtosecond laser pulses are used to study the magnitude, dynamics and sign of the third order nonlinear optical susceptibility {dollar}\chi\sp{lcub}(3){rcub}{dollar} in a series of oligothiophenes using degenerate four-wave mixing and z-scan techniques. The effects of conjugation length, quantum confinement, and packing on the third order nonlinearity are investigated for the first time. Fluence effects on the dynamics of nonlinear optical properties of thiophene polymer films are reported. A detailed model of the diffusion processes in polydithieno(3,2-b;2{dollar}\sp\prime,3\sp\prime{dollar}-d)thiophene (PDTT) thin films is given.
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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.
