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    Polarization properties of gratings made in uniaxial birefringent materials.

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    Author
    Han, Chien-Wei.
    Issue Date
    1995
    Committee Chair
    Kostuk, Raymond
    
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    Publisher
    The University of Arizona.
    Rights
    Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
    Abstract
    The diffraction characteristics of light from gratings formed in anisotropic volume and surface-relief gratings are examined. The rigorous coupled-wave equations for computing diffraction efficiencies and polarization of light from a volume grating formed in anisotropic substrates are derived. A grating made in a uniaxial birefringent material with its grating vector within the plane of incidence has the unique property that the incident and diffracted light may have different polarization. A holographic polarization selective grating was designed and made in dichromated gelatin and experimentally tested in a magneto-optic head tester. The performance of the grating was compared to that of a polarization beamsplitter cube. The coupled-wave equations for anisotropic volume gratings are modified to compute efficiencies from surface relief gratings. The method involves applying the Fourier series expansion on the nine permittivity elements in a tensor and subtracting the corresponding elements in the tensor describing the adjacent medium The enhanced birefringence effects which result from sub-wavelength period gratings made in a uniaxial material are theoretically investigated. When the natural optical axis and the induced optical axis are parallel or perpendicular to each other within the surface plane, the phase shift varies linearly with the thickness of the grating. When the two axes have an angular separation between them and lie within the surface plane, the phase shift varies nonlinearly with the thickness of the grating.
    Type
    text
    Dissertation-Reproduction (electronic)
    Degree Name
    Ph.D.
    Degree Level
    doctoral
    Degree Program
    Optical Sciences
    Graduate College
    Degree Grantor
    University of Arizona
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    Dissertations

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