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Proceedings Paper

Near-field effects in spatial coherence of thermal sources of light: short-range and long-range correlations
Author(s): Jean-Jacques Greffet; Remi Carminati
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Paper Abstract

In this paper, we establish the form of the spectral degree of spatial coherence of the field thermally emitted by a planar opaque surface. Our approach is based on the fluctuation-dissipation theorem. Several new properties are derived. It is shown that for lossy media, the coherence length in a plane very close to the surface is essentially the skin depth. Thus, it can be much smaller than the wavelength. However, if the metal can support a surface wave, the coherence length can be much larger than the wavelength.

Paper Details

Date Published: 19 July 1999
PDF: 2 pages
Proc. SPIE 3749, 18th Congress of the International Commission for Optics, (19 July 1999); doi: 10.1117/12.355047
Show Author Affiliations
Jean-Jacques Greffet, Ecole Central Paris (France)
Remi Carminati, Ecole Central Paris (France)


Published in SPIE Proceedings Vol. 3749:
18th Congress of the International Commission for Optics

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