dorsal/arxiv
View SchemaElectromagnetic field correlations near a surface with a nonlocal optical response
| Authors | Carsten Henkel, Karl Joulain |
|---|---|
| Categories | |
| ArXiv ID | physics/0603198 |
| URL | https://arxiv.org/abs/physics/0603198 |
| DOI | 10.1007/s00340-006-2219-9 |
| Journal | Appl. Phys. B 84 (2006) 61 |
Abstract
The coherence length of the thermal electromagnetic field near a planar surface has a minimum value related to the nonlocal dielectric response of the material. We perform two model calculations of the electric energy density and the field's degree of spatial coherence. Above a polar crystal, the lattice constant gives the minimum coherence length. It also gives the upper limit to the near field energy density, cutting off its $1/z^3$ divergence. Near an electron plasma described by the semiclassical Lindhard dielectric function, the corresponding length scale is fixed by plasma screening to the Thomas-Fermi length. The electron mean free path, however, sets a larger scale where significant deviations from the local description are visible.
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"abstract": "The coherence length of the thermal electromagnetic field near a planar\nsurface has a minimum value related to the nonlocal dielectric response of the\nmaterial. We perform two model calculations of the electric energy density and\nthe field\u0027s degree of spatial coherence. Above a polar crystal, the lattice\nconstant gives the minimum coherence length. It also gives the upper limit to\nthe near field energy density, cutting off its $1/z^3$ divergence. Near an\nelectron plasma described by the semiclassical Lindhard dielectric function,\nthe corresponding length scale is fixed by plasma screening to the Thomas-Fermi\nlength. The electron mean free path, however, sets a larger scale where\nsignificant deviations from the local description are visible.",
"arxiv_id": "physics/0603198",
"authors": [
"Carsten Henkel",
"Karl Joulain"
],
"categories": [
"physics.optics"
],
"doi": "10.1007/s00340-006-2219-9",
"journal_ref": "Appl. Phys. B 84 (2006) 61",
"title": "Electromagnetic field correlations near a surface with a nonlocal optical response",
"url": "https://arxiv.org/abs/physics/0603198"
},
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