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We present theoretical and numerical studies of dispersion characteristics for the guided modes in double metal waveguides (DMW) of quantum cascade lasers (QCLs). Analytical model of the QCL waveguide is based on the modified Marcatili method, which is applied to a rectangular waveguide with anisotropic layered dielectric medium and two perfect conductor or Leontovich boundary conditions representing lossy metal films.
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Zhmud et al. (2024) studied this question.
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