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30 June 1994 Evaluation of bound and leaky eigenmode techniques for nontransparent waveguides
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The use of bound and leaky eigenmodes to describe propagation in radiatively leaky planar waveguides that incorporate material absorption or gain is discussed. A criterion for determining which of the bound and leaky modes should be included in this calculation is provided, as is an explicit means of determining the contribution of each modes. The strategy provided here reveals that for the case of absorptive devices, e.g., waveguide detector structures or absorptive filters, there exists a regime in which one must discard the contribution of a fundamental mode, in favor of an improper leaky mode if one wishes to accurately obtain results such as quantum efficiency and device throughput.
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R. E. Smith and Susan N. Houde-Walter "Evaluation of bound and leaky eigenmode techniques for nontransparent waveguides", Proc. SPIE 2146, Physics and Simulation of Optoelectronic Devices II, (30 June 1994);

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