Title

Spatial Correlations In The Near Field Of Random Media

Abstract

The conventional coherence theory suggests that the fields radiated by statistically homogeneous sources correlate over spatial regions of the order of the wavelength irrespective of the distance from the surface of the source. Contrary to these predictions, we show that the spatial correlations of optical fields in close proximity of highly scattering, randomly inhomogeneous media depend on this distance and, moreover, their extent can be significantly smaller than the wavelength. The contribution of evanescent fields is experimentally demonstrated and the coherence length in the near field is shown to relate to the coherence properties at the surface which are, in turn, determined by the structural characteristics of the random media. © 2003 The American Physical Society.

Publication Date

8-26-2003

Publication Title

Physical Review Letters

Volume

91

Issue

9

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1103/PhysRevLett.91.093901

Socpus ID

0142089090 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/0142089090

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