Fluctuation Electromagnetic Interaction Between Rotating Nanoparticle and Near-Field of the Surface

TL;DR

This paper develops a theoretical framework to analyze the electromagnetic interactions, including friction torque and heat exchange, between a rotating nanoparticle and a surface, considering arbitrary rotation axis orientations.

Contribution

It introduces a general theoretical approach for fluctuation electromagnetic interactions with arbitrary rotation axis orientation, extending previous models with specific axis assumptions.

Findings

Derived integral expressions for torque, energy, and heat exchange with different coefficients.

Numerical estimations for gold and silicon carbide systems.

Compared results with previous perpendicular rotation axis case.

Abstract

Fluctuation electromagnetic interaction between a small rotating particle and a polarizable surface produces the friction torque on the particle, changes the attraction force (van -der -Waals force) and the rate of heat exchange in this system. In this paper we consider the case where the rotation axis is parallel to the surface. We present general theoretical basis allowing to obtain characteristics of the interaction at an arbitrary orientation of the rotation axis. In comparison to the case where the rotation axis is perpendicular to the surface (arXiv: 1208.2603), the obtained integral expressions for the friction torque, interaction energy and heating rate have different numerical coefficients. Numerical estimations are given in the case Au (particle)- Au(surface) and SiC (particle)-SiC (surface).