Nonreciprocal Channels of Light Through the Coupling of Two Nonsymmetric Tamm Magnetoplasmon Polaritons

We propose a coupled system that can produce nonreciprocal channels of light. The system consists of a metal layer sandwiched between two magnetophotonic crystals (MPCs). A resonance mode called Tamm magnetoplasmon polariton (TMP) around the interfaces between the metal and the MPCs can be achieved in this structure. It is found that nonreciprocal light-tunneling channels can be obtained through the coupling of two nonsymmetric TMPs. The nonreciprocal wavelength channels can be adjusted, depending on the incidence direction of the light, whereas the nonreciprocal direction channels can be adjusted, depending on the wavelength of the incident light. Results are demonstrated through electromagnetic-field simulations based on a finite-element solver.