New effect in near-field thermal emission

A near-field effect has been discovered experimentally in thermal radio emission of an absorbing dielectric medium. It is related to a specific character of the distribution of a quasistationary field component near a radiating surface. The effect consists of the fact that the effective depth of the...

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Bibliographic Details
Published in:Physical review letters 2002-03, Vol.88 (10), p.104302-104302, Article 104302
Main Authors: Gaikovich, K P, Reznik, A N, Vaks, V L, Yurasova, N V
Format: Article
Language:English
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Summary:A near-field effect has been discovered experimentally in thermal radio emission of an absorbing dielectric medium. It is related to a specific character of the distribution of a quasistationary field component near a radiating surface. The effect consists of the fact that the effective depth of the received emission formation appears to be less than the skin-layer depth and depends on the size of the receiver antenna and its height above the surface. It can be considered as a new source of information about depth temperature distribution. A theory has been developed that allows for determining the relative contribution of wave and quasistationary components to the Plank emission received near the surface.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.88.104302