Coupling of Sommerfeld waves using odd TM mode of double-dielectric-slab waveguide

摘要

We report the coupling of cylindrical metal wire THz surface plasmon-polaritons using odd TM mode of double-dielectric-slab waveguide. We analyze the mode matching issue. We calculate the coupling efficiency of the double-dielectric-slab waveguide to copper wire of 1 mm diameter with respect to waveguide structure, beam structure and the THz frequency, theoretically. It is concluded that at 4.2 THz the highest coupling efficiency achieved to be is 43.5 %. We further show the coupling experimental system.