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General relation between spatial coherence and absorption

Abstract : Despite the fact that incandescent sources are usually spatially incoherent, it has been known for some time that a proper design of a thermal source can modify its spatial coherence. A natural question is whether it is possible to extend this analysis to electroluminescence and photoluminescence. A theoretical framework is needed to explore these properties. In this paper, we extend a general coherence-absorption relation valid at equilibrium to two non-equilibrium cases: luminescent bodies and anisothermal bodies. We then use this relation to analyse the differences between the isothermal and anisothermal cases and to study the near-field emission of an electroluminescent source.
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Submitted on : Monday, January 18, 2021 - 2:35:39 PM
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D. Tihon, S. Withington, E. Bailly, B. Vest, J.-J. Greffet. General relation between spatial coherence and absorption. Optics Express, Optical Society of America - OSA Publishing, 2021, 29 (1), pp.425. ⟨10.1364/OE.405484⟩. ⟨hal-03113586⟩



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