Tunable wide-angle dual-channel nonreciprocal radiation in a hybrid graphene-Weyl semimetal structure

Nonreciprocal radiation, violating Kirchhoff’s law, has sparked significant interest due to its potential in energy conversion and capture technologies. In this paper, we introduce a hybrid structure combining graphene and Weyl semimetal to achieve tunable dual-channel nonreciprocal radiation through guided mode resonances. This structure overcomes the limitations of traditional single-channel systems by offering dual-channel nonreciprocal radiation, enhanced efficiency, and increased flexibility. The structure exhibits excellent wide-angle nonreciprocal characteristics. Furthermore, by investigating the impact of structural parameters, the structure demonstrates large parameter tolerance, facilitating practical fabrication. Finally, leveraging the tunable properties of graphene, we showcase the linear control behavior of the system. Our findings pave the way for advanced energy-harvesting and conversion structures in advanced thermal systems.