Energy pathways in nanoscale thermal radiation

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We show in this letter that when nanoscale radiation between two parallel plates is considered, the Poynting vector is decoupled for each parallel wavevector component (beta) due to the nature of thermal emission, as manifested by the fluctuation-dissipation theorem. The streamlines calculated by tracing the Poynting vector vividly demonstrate that the spectral radiative energy travels in infinite directions along curved lines. Depending on the beta value, the energy pathway may exhibit considerable lateral shift. This letter elucidates the fundamental characteristics of nanoscale thermal radiation that is important for applications, such as near-field optical sensors and energy conversion devices. (C) 2007 American Institute of Physics.
Publisher
AMER INST PHYSICS
Issue Date
2007-10
Language
English
Article Type
Article
Keywords

HEAT-TRANSFER; NEAR-FIELD; ELECTROMAGNETIC-WAVES; MICROSCOPY; SUPERLENS; SILICON

Citation

APPLIED PHYSICS LETTERS, v.91, no.15

ISSN
0003-6951
DOI
10.1063/1.2793688
URI
http://hdl.handle.net/10203/89316
Appears in Collection
ME-Journal Papers(저널논문)
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