Photolithography of integrated optic devices in porous glasses.
Item
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Title
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Photolithography of integrated optic devices in porous glasses.
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Identifier
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AAI9304706
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identifier
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9304706
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Creator
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Mendoza, Edgar Alfredo.
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Contributor
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Adviser: Harry D. Gafney
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Date
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1992
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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, Physical | Physics, Condensed Matter
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Abstract
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Collaborative studies in our laboratories, and those of Corning Inc., have established that highly resolved patterns of refractive index gradients ranging from 0.01 to 0.001 can be produced by photolysis of organotin compounds physisorbed onto Corning's code 7930 porous Vycor glass (PVG) followed by thermal consolidation of the glass at 1200{dollar}\sp\circ{dollar}C. Photolysis binds the metal compound to the glass and thermal activation removes the unreacted adsorbate and converts the photoproduct to a transparent metal oxide. Deposition of the metal oxide changes the density of the glass and in turn, its refractive index. Although applications of gradient refractive index patterns within glass matrices in the field of integrated optics have been recognized for many years, full utilization of this technology requires a fundamental understanding of the chemistry involved during the photochemical and thermal reactions leading to metal oxide formation on the surface of PVG.;The research described in this thesis focuses on the study of the photochemistry of organotin compounds of the general formula R(4-n)SnXn where R = alkyl and aryl and X = halides and pseudohalides. Photochemical studies in solution are compared to those on PVG. The experiments take advantage of the transparency of PVG to characterize the photochemical reactions of the adsorbed compounds using conventional spectroscopic techniques.;The goal of these studies is to develop a methodology capable of fabricating a wide range of integrated optical devices in a glass matrix. Examples of different optical components that have been produced by these photodeposition techniques are presented.
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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.
