Nanoscale heat flux between nanoporous materials

By combining stochastic electrodynamics and the Maxwell-Garnett 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 surfa...

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Bibliographic Details
Published in:Optics express 2011-09, Vol.19 Suppl 5 (S5), p.A1088-A1103
Main Authors: Biehs, S-A, Ben-Abdallah, P, Rosa, F S S, Joulain, K, Greffet, J-J
Format: Article
Language:English
Subjects:
Condensed Matter
Engineering Sciences
Materials Science
Mechanics
Optics
Photonic
Physics
Thermics
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Summary:By combining stochastic electrodynamics and the Maxwell-Garnett 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.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.19.0A1088