Modeling of scattering and depolarizing electro-optic devices. II. Device simulation.
We describe a simple method for performing accurate computer simulation and modeling of arbitrary-geometry electro-optic (EO) devices. We use a material EO model that includes the effects of scattering and depolarization as well as the change in the index of refraction. Finite-element analysis is used to determine the electrostatic field distribution for EO device designs. Attenuation of the transmitted light intensity as a result of scattering is modeled as an exponential function, and the intensity of transmitted depolarized light is shown to be a function of the scattering intensity. The total optical transmittance is determined by integration of these values over all the elements in the path of the propagating light. Lanthanum-modified lead zirconate titanate-based surface-electrode and transverse-electrode EO devices are designed and fabricated. Their experimentally measured performance is found to be in excellent agreement with our computer-simulation results.
Shames
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Department of Electrical and Computer Engineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093-0407, USA.
Sun
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Fainman
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