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Nanoscale heat flux between nanoporous materials
S-A Biehs1, P Ben-Abdallah, F S S Rosa
1Laboratoire Charles Fabry, Institut d’Optique, CNRS, Université Paris-Sud, Campus Polytechnique, RD 128, Palaiseau Cedex, France. age.biehs@institutoptique.fr
Optics Express
|September 22, 2011
Summary
Air inclusions significantly enhance radiative heat transfer between nanoporous materials by introducing new heat transfer channels and modes. This study advances understanding of nanoscale heat flux in metamaterials.
Area of Science:
- Condensed Matter Physics
- Nanoscale Science
- Thermodynamics
Background:
- Radiative heat transfer is crucial at the nanoscale.
- Nanoporous materials offer unique thermal properties.
- Effective medium theories describe composite material behavior.
Purpose of the Study:
- Investigate radiative heat transfer between nanoporous materials.
- Analyze the impact of air inclusions on heat flux.
- Generalize nanoscale heat flux expressions for anisotropic metamaterials.
Main Methods:
- Combined stochastic electrodynamics and Maxwell-Garnett effective medium theory.
- Analyzed heat transfer across a gap between nanoporous materials.
- Investigated the role of surface waves and frustrated modes.
Main Results:
- Air inclusions significantly enhance radiative heat flux.
- Identified supplementary heat transfer channels via additional surface waves.
- Observed increased contribution from ordinary surface waves at resonance.
- Noted the emergence of frustrated modes over a wide spectral range.
Conclusions:
- Air inclusions provide a mechanism to boost radiative heat transfer in nanoporous materials.
- The findings offer a generalized expression for nanoscale heat flux in anisotropic metamaterials.
- Understanding these mechanisms is key for thermal management in nanodevices.
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