Direct observation and control of near-field radiative energy transfer in a natural hyperbolic material - Groupe Nanophotonique Access content directly
Preprints, Working Papers, ... Year : 2023

Direct observation and control of near-field radiative energy transfer in a natural hyperbolic material

R Bretel
  • Function : Author
M Tharrault
  • Function : Author
D Mele
  • Function : Author
T Taniguchi
  • Function : Author
K Watanabe
  • Function : Author
C Maestre
  • Function : Author
C Journet
  • Function : Author
B Toury
  • Function : Author
V Garnier
  • Function : Author
P Steyer
  • Function : Author
J H Edgar
  • Function : Author
E Janzen
  • Function : Author
Jean-Marc Berroir
Gwendal Fève
Gerbold Ménard
Bernard Plaçais
Christophe Voisin
B. Vest
Emmanuel Baudin

Abstract

Heat control is a key issue in nano-electronics, where new efficient energy transfer mechanisms are highly sought after. In this respect, there is indirect evidence that high-mobility hexagonal boron nitride (hBN)-encapsulated graphene exhibits hyperbolic out-of-plane radiative energy transfer when driven out-of-equilibrium. Here we directly observe radiative energy transfer due to the hyperbolic phonon-polaritons modes of the hBN encapsulant in intrinsic graphene devices under large bias, using mid-infrared spectroscopy and pyrometry. By using different hBN crystals of varied crystalline quality, we engineer the energy transfer efficiency, a key asset for compact thermal management of electronic circuits.
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Dates and versions

hal-04276261 , version 1 (08-11-2023)

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L Abou-Hamdan, A Schmitt, R Bretel, S Rossetti, M Tharrault, et al.. Direct observation and control of near-field radiative energy transfer in a natural hyperbolic material. 2023. ⟨hal-04276261⟩
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