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

By P. Chapuis, S. Volz, C. Henkel, K. Joulain, Jean-Jacques Greffet. 2008

152 citations recorded by the source corpus.

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 BoltzmannMermin models. We find that local and non-local models yield the same heat fluxes for gaps larger than 2nm. 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.

Subfields: Atomic and Molecular Physics, and Optics, Civil and Structural Engineering, Statistical and Nonlinear Physics

View Paper: https://www.semanticscholar.org/paper/562d96220be01b023f74ac0e054c26883cee9f84

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In Atomic and Molecular Physics, and Optics

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Citations in the corpus

Near-Field Thermal Radiation: Recent Progress and Outlook (2015, methodology): “By introducing a nonlocal model of dielectric functions, the divergence is removed and the heat flux tends to saturate at subnanometer distances [120, 170].”
Review of near‐field thermal radiation and its application to energy conversion (2009, unknown): “Similar results have been obtained between two metallic surfaces [21].”
Radiative heat transfer at the nanoscale (2009, background): “The understanding of the role of non-local effects at distances smaller than 10 nm is also a subject under examination in the literatur”