Hyperbolic waveguide for long-distance transport of near-field heat flux

TL;DR

This paper demonstrates that hyperbolic waveguides can enable super-Planckian near-field heat transfer over arbitrarily large distances, surpassing traditional limits and enabling long-distance thermal energy transport.

Contribution

It introduces hyperbolic waveguides as a means to achieve super-Planckian heat transfer at large separations, extending near-field thermal transport capabilities.

Findings

Super-Planckian heat transfer is possible at large distances with hyperbolic waveguides.

Weakly dissipating hyperbolic waveguides facilitate long-distance near-field heat flux.

The approach broadens potential applications in thermal energy management.

Abstract

Heat flux exchanged between two hot bodies at subwavelength separation distances can exceed the limit predicted by the blackbody theory. However this super-Planckian transfer is restricted to these separation distances. Here we demonstrate the possible existence of a super-Planckian transfer at arbitrary large separation distances if the interacting bodies are connected in near-field with weakly dissipating hyperbolic waveguides. This result opens the way to long distance transport of near-field thermal energy.