Tunable near-field thermal radiation between graphene-assisted Bi2Se3

Abstract The present work reports a theoretical enhancement of the near-field thermal radiation between stacked arrangement consisting of a repetitive structure of a graphene sheet and a Bi2Se3 slab, due to the coupling of hyperbolic phonon polaritons and surface plasmon polaritons. It is found that the graphene- Bi2Se3 monocell enable wider hybrid polaritons compared to the multilayer configuration. In particular, the heat flux of monocell exhibits 1.41 fold and 1.97 fold higher than those of double-cell and ten-cell configurations. The efficient modulation of the near-field thermal radiation can be observed by tuning chemical potential of graphene and thickness of Bi2Se3 film. Fundamentally, the results may be helpful for the applications of microscale and nanoscale energy saving and radiative cooling.