Abstract
With the use of the iteration method and bilinear functional based on two-dimensional volume integral equation, LM modes existing in a plane-layered dielectric waveguide and quasi-LM modes existing in a multilayered rectangular dielectric waveguide are studied. The semiconductor layers are described as a homogeneous single-component dissipative plasma that can exhibit negative conductivity owing to external electric field. The results obtained for a homogeneous single-layer rectangular waveguide are compared to the results obtained with a model of a planar single-layer waveguide. Structures with passive and active semiconductor-plasma layers are investigated. It is shown that amplification is possible at frequencies above the cutoff frequency and that the dispersion laws below the cutoff are complicated.
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