Near-field radiative heat transfer of nanoparticles mediated by moving metasurfaces

The bidirectional symmetry of electromagnetic wave propagation in optomechanical systems can be effec-tively disrupted, leading to the achievement of novel devices for unconventional photon transport. This article investigates the near-field radiative heat transfer (NFRHT) between nanoparticles based on moving metasurfaces. The modeling is based on isotropic silicon carbide (SiC) particles and a graphene metasurface and the NFRHT is analyzed using the Green's function and conductivity approximation. This study reveals that when the velocity of the metasurface is sufficiently high, the radiative heat flux in the near field becomes highly nonreciprocal. By selecting appropriate chemical potentials and particle arrangement positions, the thermal conductivity coefficient can be enhanced or suppressed by up to five orders of magnitude. The required threshold velocity for the thermal diode we constructed is also significantly reduced under specific chemical potentials. These findings provide theoretical support for scenarios involving high-speed relative motion in the near field.