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

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.

10 pages, 11 figures

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• Broadband super-Planckian thermal emission from hyperbolic metamaterials
• Radiative bistability and thermal memory
• Resonant photon tunneling enhancement of the radiative heat transfer
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• Large penetration depth of near-field heat flux in hyperbolic media
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