Near-field radiative heat transfer between moving anisotropic surfaces

Radiation heat transfer from two-dimensional anisotropic materials has promising applications in nanodevices, such as non-contact thermal modulators, thermal lithography and thermophotovoltaics. Moving surface is expected to provide more possibilities for the modulation of near-field thermal radiation due to its special properties such as supporting hyperbolic propagation and non-reciprocity. In this study, the near-field radiative heat transfer between moving anisotropic surfaces is investigated in the framework of the fluctuation-dissipation electrodynamics theory combined with the Lorentz transformation. It is found that the movement and rotation of the surface lead to the asymmetry of energy transfer in the wave vector space, which affects the energy transfer coefficient and hence the radiation heat flux. The effect of velocity, separation distance, rotation angle and electron density on the energy transfer coefficient and radiative heat flux between moving anisotropic surfaces is revealed. It is found that the heat flux decreases as the velocity increases, the sensitivity of the heat flux variation with velocity decreases as the velocity increases. This study provides a new idea for the active regulation of near-field radiative heat transfer.