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Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2008

Effects of spatial dispersion in near-field radiative heat transfer between two parallel metallic surfaces

Résumé

We study the heat transfer between two parallel metallic semi-infinite media with a gap in the nanometer-scale range. We show that the near-field radiative heat flux saturates at distances smaller than the metal skin depth when using a local dielectric constant and investigate the origin of this effect. The effect of non-local corrections is analysed using the Lindhard-Mermin and Boltzmann-Mermin models. We find that local and non-local models yield the same heat fluxes for gaps larger than 2 nm. Finally, we explain the saturation observed in a recent experiment as a manifestation of the skin depth and show that heat is mainly dissipated by eddy currents in metallic bodies.
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Dates et versions

hal-00252057 , version 1 (13-02-2008)

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Pierre-Olivier Chapuis, Sebastian Volz, Carsten Henkel, Karl Joulain, Jean-Jacques Greffet. Effects of spatial dispersion in near-field radiative heat transfer between two parallel metallic surfaces. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2008, 77 (3), pp.035431. ⟨10.1103/PhysRevB.77.035431⟩. ⟨hal-00252057⟩
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