Analysis of optical channel waveguides composed of bianisotropic materials with a strong magnetoelectric effect using a transmission-line formulation

Abstract

Optical modes in channel waveguides composed of lossy bianisotropic magnetoelectric (ME) materials have been theoretically investigated here. In this study, a semi-analytical method based on the Fourier expansion technique, a well-known transmission-line formulation, is generalized to ME materials in a general case. Using this method, the dispersion diagram, including both phase and attenuation constants, and the field profile of the guided modes in channel waveguides such as rib waveguides are obtained. The presence of ME materials changes the polarization of guided modes in the structure. In all stages of the analysis, the numerical results are calculated and compared with those generated by commercial electromagnetic solvers to verify the computational efficiency and accuracy of the proposed method.