Complementary Metasurfaces for Guiding Electromagnetic Wave

Metasurfaces can be employed for designing waveguides that confine the electromagnetic energy while they are open structures. In this communication, we introduce a new type of such waveguides, formed by two penetrable metasurfaces having complementary isotropic surface impedances. We theoretically study guided modes supported proposed structure and discuss corresponding dispersion properties. show results different scenarios in which impedances possess nonresonant or resonant characteristics, distance between changes from large values to extreme limit zero. also derive describe general condition existence with orthogonal polarizations same phase velocity. particular case them is not small, indicate phenomenon occurs within broad frequency range. This property promising applications leaky-wave antennas field focusing.