Revisiting thermal radiation in the near field

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• 作者：Jean-Jacques Greffet ^{jean-jacques.greffet@institutoptique.fr}
• 关键词：Nanophotonics ; Blackbody radiation ; Coherence ; Surface plasmon ; Surface phonon polariton ; Radiative heat transfer
• 刊名：Comptes Rendus Physique
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：18
• 期：1
• 页码：24-30
• 全文大小：716 K
• 卷排序：18

文摘

Thermal radiation is generally assumed to be both spatially and temporally incoherent. In this paper, we challenge this idea. It is possible to design incandescent sources that are directional and spectrally selective by taking advantage of surface waves. We also report the discovery of the enhancement by several orders of magnitude of the energy density close to an interface at a particular frequency as well as the enhancement of the radiative flux between two interfaces when surface phonon polaritons can be excited. These results lead to the design of a novel class of infrared incandescent sources with potential applications in spectroscopy and thermophotovoltaic energy conversion.