Magnetically tunable non-reciprocal plasmons resonator based on graphene-coated nanowire

摘要: In this paper we propose a magnetically tunable plasmons resonator based on graphene-coated nanowire. Due to the magneto-optical effect under an external magnetic field, circumferential propagation of graphene nanowire becomes non-reciprocal with modal indices depend traveling directions (clockwise or anti-clockwise). When coupled sheet waveguide, two components form filter for which shift direction transmittance spectrum is determined by input plasmons. The resonant wavelengths are obtained through cavity theory and verified numerical solutions. Furthermore, enables such structures achieve function isolator where isolation could be tuned amplitude field enabled switched reversing field. Under proper structural parameters ratio over 25 dB obtained. proposed may provide new inspiration plasmonics devices.