Nonreciprocal photonic spin Hall effect of magnetic Weyl semimetals

Magnetic Weyl semimetals allow the unique opportunities for the realizations of nonreciprocal optical properties, thermal radiation, and anomalous photon thermal Hall effect without the requirement of an external magnetic field. Here, we theoretically investigate the photonic spin Hall effect in the magnetic Weyl semimetal-based multilayered structure and demonstrate that this effect is nontrivial and nonreciprocal. Its induced nontrivial photonic spin Hall effect originates from the large differences between the reflectances under different polarized waves. In addition, the generation of this kind of nonreciprocal photonic spin Hall effect is guaranteed by the simultaneously broken space inversion symmetry and time reversal symmetry of this specific structure. Specially, the responses of nonreciprocal photonic spin Hall effect can sustain within a certain range of incident angle and it can be effectively manipulated by varying the Fermi energy of magnetic Weyl semimetals. Our work expands the fields of the photonic spin Hall effects and suggests magnetic Weyl semimetals potential candidates in the next-generation nonreciprocal spin photonic devices.