Controlling radiative heat flow through cavity electrodynamics

TL;DR

This paper develops a formalism to control radiative heat flow via cavity electrodynamics, showing that coplanar cavities can significantly influence heat exchange when resonant in the mid-IR range, with spectral filtering needed for lower frequencies.

Contribution

It introduces a new formalism to describe cavity-mediated energy exchange and demonstrates how cavity resonance can modulate radiative heat flow in materials.

Findings

Coplanar cavities affect heat load when resonant in mid-IR.

Spectral filtering is necessary for lower frequency cavities.

Cavity resonance can significantly control radiative heat transfer.

Abstract

Cavity electrodynamics is emerging as a promising tool to control chemical processes and quantum material properties. In this work we develop a formalism to describe the cavity mediated energy exchange between a material and its electromagnetic environment. We show that coplanar cavities can significantly affect the heat load on the sample if the cavity resonance lies within the frequency region where free-space radiative heat dominates, typically the mid-IR at ambient temperature, while spectral filtering is necessary for having an effect with lower frequency cavities.