Nanoscale thermal radiation between two gold surfaces
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Chen_Nanoscale thermal.pdf
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1.05 MB
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Checksum (MD5)
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Author(s)
Shen, Sheng
Mavrokefalos, Anastassios
Sambegoro, Poetro Lebdo
Chen, Gang
Date Issued
June 2012
Journal
Applied Physics Letters
Publisher
American Institute of Physics (AIP)
Citation
Shen, Sheng et al. “Nanoscale Thermal Radiation Between Two Gold Surfaces.” Applied Physics Letters 100.23 (2012): 233114. ©2012 American Institute of Physics
Version
Final published version
Abstract
In this letter, we measured the nanoscale thermal radiation between a microsphere and a substrate which were both coated with thick gold films. Although gold is highly reflective for thermal radiation, the radiative heat transfer between two gold surfaces was demonstrated to be significantly enhanced at nanoscale gaps beyond the blackbody radiation limit due to the tunneling of non-resonant evanescent waves. The measured heat transfer coefficient between two gold surfaces agreed well with theoretical prediction. At a gap d = 30 nm ± 5 nm, the heat transfer coefficient between two gold surfaces was observed to be as large as ∼400 W/m[superscript 2]·K, much greater than the blackbody radiation limit (∼5 W/m[superscript 2]·K).
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Massachusetts Institute of Technology. School of Engineering
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1063/1.4723713
