Abstract

The drastic difference between complex transmission coefficients for TE11 and TH11 GHz modes prop- agating through subwavelength gradient barriers in a metallic waveguide is examined. Amplitude-phase structures of the transmitted TE11 and TH11 modes are described in the framework of an exactly solvable model of these barriers. A sharp contrast in transmission is found between degenerate TE 11 and TH11 modes distinguished by their polarization structures due to polarization-dependent tunneling and nonlocal energy transport through thin gradient dielectric barriers.

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