Spatial coherence of thermal near fields

Details Spatial coherence of thermal near fields Spatial coherence of thermal near fields

2000-08-10

arxiv.org/abs/physics/0008028v1

Opt. Commun. 183 (2000) 57-67

Physics

Optics

13 pages, 8 graphs, includes Elsevier elsart.cls preprint style. Submitted to Optics Communications (27 july 2000)

Scientific paper

10.1016/S0030-4018(00)01048-8

We analyze the spatial coherence of the electromagnetic field emitted by a half-space at temperature T close to the interface. An asymptotic analysis allows to identify three different contributions to the cross-spectral density tensor in the near-field regime. It is shown that the coherence length can be either much larger or much shorter than the wavelength depending on the dominant contribution.

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