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    Finite difference time domain modeling of optical devices.

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    Author
    Judkins, Justin Boyd.
    Issue Date
    1995
    Committee Chair
    Ziolkowski, Richard
    
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    Show full item record
    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
    A series of enhancements are made to the standard finite difference time domain (FDTD) approach which allow for new classes of problems to be modeled. These enhancements include material models for dispersive linear and nonlinear media, a new source formulation, which provides a means for driving an incident beam along a total field/scattered field boundary, and an efficient near to far field transform based on a Huygen's equivalent source reconstruction. The dispersive material improvements to the FDTD approach include the linear Lorentz, the nonlinear Raman, and the instantaneous Kerr models. Incorporation of the Lorentz dispersion model allowed us to model scattering from good conductors such as the noble metals (Au, Ag, Cu) in the optical regime. Following its theoretical development, the modified FDTD method is applied to three classes of problems: the modeling of nonlinear corrugated optical wave guide beam steering and output coupling devices, the rigorous treatment of metallic thin film diffraction gratings, and the modeling of tracking signals produced by realistic optical data storage disk geometries. Comparisons with mode matching analytical results and experimental data for realistic structures validate these FDTD improvements.
    Type
    text
    Dissertation-Reproduction (electronic)
    Degree Name
    Ph.D.
    Degree Level
    doctoral
    Degree Program
    Electrical and Computer Engineering
    Graduate College
    Degree Grantor
    University of Arizona
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