TY - GEN
T1 - Enhanced coherency of thermal emission from sic by coupled resonant cavity structure
AU - Dahan, Nir
AU - Niv, Avi
AU - Gorodetski, Yuri
AU - Kleiner, Vladimir
AU - Hasman, Erez
PY - 2009
Y1 - 2009
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=70349098068&partnerID=8YFLogxK
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AN - SCOPUS:70349098068
SN - 9780791848364
T3 - 2008 Proceedings of the 9th Biennial Conference on Engineering Systems Design and Analysis
SP - 363
EP - 367
BT - 2008 Proceedings of the 9th Biennial Conference on Engineering Systems Design and Analysis
T2 - 2008 9th Biennial Conference on Engineering Systems Design and Analysis
Y2 - 7 July 2008 through 9 July 2008
ER -