Enhanced coherency of thermal emission from sic by coupled resonant cavity structure

Nir Dahan, Avi Niv, Yuri Gorodetski, Vladimir Kleiner, Erez Hasman

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Surface waves have been shown to play a key role in spontaneous thermal emission in the near-field as well as the coherence and the polarization properties of the nonradiative field. The near-field coherence of the delocalized nonradiative surface waves can be transferred into radiative fields by introducing a shallow grating on the surface. We show that the coherency of the thermal radiation can be enhanced by an order of magnitude compared with the coherency imposed by the delocalized surface waves. The enhanced coherency is due to coherent coupling between resonant cavities obtained by surface standing waves, where each cavity supports localized field that is attributed to coupled surface waves. We realized coupled resonant cavity structure on amorphous SiO2 and crystalline SiC, both support surface phonon-polaritons, to demonstrate extraordinary coherent thermal emission with a high quality factor of 600 and a spatial coherence length of 760λ.

Original languageEnglish
Title of host publication2008 Proceedings of the 9th Biennial Conference on Engineering Systems Design and Analysis
Pages363-367
Number of pages5
StatePublished - 21 Sep 2009
Externally publishedYes
Event2008 9th Biennial Conference on Engineering Systems Design and Analysis - Haifa, Israel
Duration: 7 Jul 20089 Jul 2008

Publication series

Name2008 Proceedings of the 9th Biennial Conference on Engineering Systems Design and Analysis
Volume4

Conference

Conference2008 9th Biennial Conference on Engineering Systems Design and Analysis
Country/TerritoryIsrael
CityHaifa
Period7/07/089/07/08

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