A thermokinetic approach to radiative heat transfer at the nanoscale

Radiative heat exchange at the nanoscale presents a challenge for several areas due to its scope and nature. Here, we provide a thermokinetic description of microscale radiative energy transfer including phonon-photon coupling manifested through a non-Debye relaxation behavior. We show that a lognor...

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Bibliographic Details
Published in:arXiv.org 2013-02
Main Authors: Pérez-Madrid, Agustín, Lapas, Luciano C, J Miguel Rubí
Format: Article
Language:English
Subjects:
Energy dissipation
Energy transfer
Heat exchange
Radiative heat transfer
Thermal conductivity
Variation
Online Access:Get full text
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Summary:Radiative heat exchange at the nanoscale presents a challenge for several areas due to its scope and nature. Here, we provide a thermokinetic description of microscale radiative energy transfer including phonon-photon coupling manifested through a non-Debye relaxation behavior. We show that a lognormal-like distribution of modes of relaxation accounts for this non-Debye relaxation behavior leading to the thermal conductance. We also discuss the validity of the fluctuation-dissipation theorem. The general expression for the thermal conductance we obtain fits existing experimental results with remarkable accuracy. Accordingly, our approach offers an overall explanation of radiative energy transfer through micrometric gaps regardless of geometrical configurations and distances.
ISSN:2331-8422
DOI:10.48550/arxiv.1301.6592