Breakdown of the Planck blackbody radiation law at nanoscale gaps |
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Authors: | Yong Gan and J K Chen |
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Institution: | (1) Department of Mechanical Engineering, Columbia University, New York, NY 10027, USA;(2) Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA;(3) ExxonMobil Upstream Research Company, Houston, TX 77098, USA |
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Abstract: | The Planck theory of blackbody radiation imposes a limit on the maximum radiative transfer between two objects at given temperatures.
When the two objects are close enough, near-field effects due to tunneling of evanescent waves lead to enhancement of radiative
transfer above the Planck limit. When the objects can support electromagnetic surface polaritons, the enhancement can be a
few orders-of-magnitude larger than the blackbody limit. In this paper, we summarize our recent measurements of radiative
transfer between two parallel silica surfaces and between a silica microsphere and a flat silica surface that show unambiguous
evidence of enhancement of radiative transfer due to near-field effects above the Planck limit. |
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Keywords: | PACS" target="_blank">PACS 42 25 Bs 44 40 +a 03 50 De 05 40 -a 87 64 Dz 07 79 Lh |
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