Direct observation of quasi-coherent thermal emission by a three-dimensional metallic photonic crystal.
Opt Lett
; 38(6): 911-3, 2013 Mar 15.
Article
en En
| MEDLINE
| ID: mdl-23503257
We report a direct observation of a quasi-coherent thermal emission from a heated three-dimensional photonic-crystal sample. While the sample was under Joule heating, we observed multiple oscillations in its emission interferogram and deduced a coherent length of L(coh)â
(20-40) µm, 5-10 times longer than that of a blackbody at comparable wavelengths. The observed, relatively long coherent length is attributed to coupling of thermal emission into lossy Bloch modes that oscillate coherently over a distance determined by decay length and the slow light nature of Bloch modes at the band-edges.
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1
Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
Opt Lett
Año:
2013
Tipo del documento:
Article
País de afiliación:
Taiwán
Pais de publicación:
Estados Unidos