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arXiv physics/0008028physics.opticsphysics.class-ph
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热近场的空间相干性

Spatial coherence of thermal near fields

C. Henkel, K. Joulain, R. Carminati, J. -J. Greffet

摘要:

我们分析了温度为T的半空间在界面附近发射的电磁场的空间相干性。渐近分析允许确定三个不同的贡献,在近场制度的交叉谱密度张量。研究表明,相干长度可以比波长大得多,也可以比波长短得多,具体取决于主导贡献。

英文摘要:

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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