The radiative heat transfer between a rotating nanoparticle and a plane surface

TL;DR

This paper develops a microscopic quantum model to analyze radiative heat transfer between a rotating nanoparticle and a surface, revealing a phase transition-like behavior at a critical rotational frequency.

Contribution

It introduces a Lagrangian and quantization framework for a rotating dielectric nanoparticle near a surface, extending previous models to include rotational effects.

Findings

Heat power exhibits a phase transition-like change at a critical frequency.

Results agree with previous models at low rotational frequencies.

Rotational frequency significantly influences near-field radiative transfer.

Abstract

Based on a microscopic approach, we propose a Lagrangian for the combined system of a rotating dielectric nanoparticle above a plane surface in the presence of electromagnetic vacuum fluctuations. In the framework of canonical quantization, the electromagnetic vacuum field is quantized in the presence of dielectric fields describing the nanoparticle and a semi-infinite dielectric with planar interface. The radiative heat power absorbed by the rotating nanoparticle is obtained and the result is in agreement with previous results when the the rotational frequency of the nanoparticle is zero or much smaller than the relaxation frequency of the dielectrics. The well known near field effect is reexamined and discussed in terms of the rotational frequency. The radiative heat power absorbed by the nanoparticle for well-known peak frequencies, is plotted in terms of the rotational frequency showing an interesting effect resembling a phase transition around a critical frequency, determined by the relaxation frequency of the dielectrics.