NDLI: Resonant-cavity enhanced thermal emission

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Resonant-cavity enhanced thermal emission

Content Provider	Semantic Scholar
Author	Celanovic, Ivan Perreault, David J. Kassakian, John G.
Copyright Year	2005
Abstract	In this paper we present a vertical-cavity enhanced resonant thermal emitter—a highly directional, narrowband, tunable, partially coherent thermal source. This device enhances thermal emittance of a metallic or any other highly reflective structure to unity near a cavity resonant frequency. The structure consists of a planar metallic surface e.g., silver, tungsten , a dielectric layer on top of the metal that forms a vertical cavity, followed by a multilayer dielectric stack acting as a partially transparent cavity mirror. The resonant frequency can easily be tuned by changing the cavity thickness thus shifting resonant emission peak , while the angle at which the maximum emittance appears can be tuned as well by changing the number of dielectric stack layers. The thermal emission exhibits an extremely narrow angular emission lobe, suggesting increased spatial coherence. Furthermore, we show that we can enhance the thermal emission of an arbitrarily low-emittance material, choosing a properly designed thermal cavity, to near unity.
File Format	PDF HTM / HTML
Alternate Webpage(s)	https://dspace.mit.edu/openaccess-disseminate/1721.1/86996
Alternate Webpage(s)	http://www.rle.mit.edu/per/JournalPapers/JPprbaug05p075127.pdf
Alternate Webpage(s)	http://dspace.mit.edu/openaccess-disseminate/1721.1/86996
Language	English
Access Restriction	Open
Subject Keyword	Acoustic lobing AngularJS Body cavities Choose (action) Coherence (physics) Emitter Device Component Exhibits as Topic Lambert's cosine law Resonance Silver Thickness (graph theory) anatomical layer tungsten
Content Type	Text
Resource Type	Article

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