Near-field radiative heat transport between nanoparticles inside a cavity configuration

A theoretical model is proposed to investigate the near-field radiative heat transport between two or more SiC/Au nanoparticles inside a cavity configuration composed of two semi-infinite (SiC) plates. We show that the cavity configuration can effectively enhance the near-field radiative heat transfer (NFRHT) between two nanoparticles, and the maximum amplification goes beyond seven orders of magnitude for SiC nanoparticles and two orders of magnitude for Au nanoparticles. Besides, the electric contribution to the NFRHT can exceed the magnetic contribution for Au nanoparticles. We find that the strong coupling between the surface modes of the upper and lower SiC plates plays the major role in this giant amplification. Moreover, the radiative heat transport is known to be super-diffusive in one-dimensional SiC nanoparticle chains and we realize ballistic heat transport by this cavity configuration with small gap. The findings of this work could have potential applications for the thermal management at nanoscale.