Nanoscale heat flux between nanoporous materials

Nanoscale heat flux between nanoporous materials
S.-A. Biehs,1,∗ P. Ben-Abdallah,2 F. S. S. Rosa,3 K. Joulain,4 and J.-J. Greffet5
1 Laboratoire

Charles Fabry, Institut d’Optique, CNRS, Universit´ Paris-Sud, Campus e Polytechnique, RD128, 91127 Palaiseau Cedex, France 2 Laboratoire Charles Fabry, Institut d’Optique, CNRS, Universit´ Paris-Sud, Campus e Polytechnique, RD128, 91127 Palaiseau Cedex, France 3 Laboratoire Charles Fabry, Institut d’Optique, CNRS, Universit´ Paris-Sud, Campus e Polytechnique, RD128, 91127 Palaiseau Cedex, France 4 Institut P’, CNRS-Universit´ de Poitiers UPR 3346, 86022 Poitiers Cedex, France e 5 Laboratoire Charles Fabry, Institut d’Optique, CNRS, Universit´ Paris-Sud, Campus e Polytechnique, RD128, 91127 Palaiseau Cedex, France *[e-mail]

Abstract: By combining stochastic electrodynamics and the MaxwellGarnett description for effective media we study the radiative heat transfer between two nanoporous materials. We show that the heat flux can be significantly enhanced by air inclusions, which we explain by:(a) the presence of additional surface waves that give rise to supplementary channels for heat transfer throughout the gap, (b) an increase in the contribution given by the ordinary surface waves at resonance, (c) and the appearance of frustrated modes over a broad spectral range. We generalize the known expression for the nanoscale heat flux for anisotropic metamaterials.
© 2011 Optical Society of America
OCIS codes: (160.1190) Anisotropic optical materials; (240.5420) Polaritons.

References and links
1. D. Polder and M. van Hove, “Theory of radiative heat transfer between closely spaced bodies,” Phys. Rev. B 4, 3303 (1971). 2. K. Joulain, J.-P. Mulet, F. Marquier, R. Carminati, and J.-J. Greffet, “Surface electromagnetic waves thermally excited: Radiative heat transfer, coherence properties and Casimir forces revisited in the near field,” Surf. Sci. Rep. 57, 59 (2005). 3. A. I. Volokitin and B. N. J.