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arXiv · 2202.00384

Graphene-based enhancement of near-field radiative-heat-transfer rectification

Simon Landrieux·Philippe Ben-Abdallah·Riccardo Messina
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Abstract

We present a thermal device based on the near-field interaction between two substrates made of a polar and a metal-insulator-transition material. As a result of the temperature dependence of the optical properties, this device acts as a thermal rectifier, implying a strong asymmetry in the heat flux when reversing the two temperatures. By covering both substrates with a graphene sheet we show a significant enhancement of rectification coefficient. By investigating the flux spectral properties along with its distance dependence, we prove that this enhancement is associated to a change in the power-law dependence of heat flux with respect to the separation distance in the electrostatic regime due to the presence of graphene sheets. Our results highlight the promising role of graphene-based hybrid structures in the domain of nanoscale thermal management.

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Simon Landrieux, Philippe Ben-Abdallah, Riccardo Messina. 2022-02-01. Graphene-based enhancement of near-field radiative-heat-transfer rectification. https://doi.org/10.1063/5.0087089

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