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Proceedings Paper

Upper limits to near-field radiative heat transfer: generalizing the blackbody concept
Author(s): Owen D. Miller; Alejandro W. Rodriguez; Steven G. Johnson
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Paper Abstract

For 75 years it has been known that radiative heat transfer can exceed far-field blackbody rates when two bodies are separated by less than a thermal wavelength. Yet an open question has remained: what is the maximum achievable radiative transfer rate? Here we describe basic energy-conservation principles that answer this question, yielding upper bounds that depend on the temperatures, material susceptibilities, and separation distance, but which encompass all geometries. The simple structures studied to date fall far short of the bounds, offering the possibility for significant future enhancement, with ramifications for experimental studies as well as thermophotovoltaic applications.

Paper Details

Date Published: 16 September 2016
PDF: 8 pages
Proc. SPIE 9920, Active Photonic Materials VIII, 99200B (16 September 2016); doi: 10.1117/12.2240718
Show Author Affiliations
Owen D. Miller, Yale Univ. (United States)
Alejandro W. Rodriguez, Princeton Univ. (United States)
Steven G. Johnson, Massachusetts Institute of Technology (United States)

Published in SPIE Proceedings Vol. 9920:
Active Photonic Materials VIII
Ganapathi S. Subramania; Stavroula Foteinopoulou, Editor(s)

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