Near-field effects in spatial coherence of thermal sources of light: short-range and long-range correlations

Jean-Jacques Greffet; Remi Carminati

doi:10.1117/12.355047

19 July 1999 Near-field effects in spatial coherence of thermal sources of light: short-range and long-range correlations

Jean-Jacques Greffet, Remi Carminati

Author Affiliations +

Proceedings Volume 3749, 18th Congress of the International Commission for Optics; (1999) https://doi.org/10.1117/12.355047
Event: ICO XVIII 18th Congress of the International Commission for Optics, 1999, San Francisco, CA, United States

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.

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Jean-Jacques Greffet and Remi Carminati "Near-field effects in spatial coherence of thermal sources of light: short-range and long-range correlations", Proc. SPIE 3749, 18th Congress of the International Commission for Optics, (19 July 1999); https://doi.org/10.1117/12.355047

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