Browsing by Author "Bur, James"

Now showing 1 - 1 of 1

Direct observation of quasi-coherent thermal emission by a three-dimensional metallic photonic crystal
(2013-03-15)
Hsieh, Mei-Li
;
Bur, James
;
Kim, Yong-Sung
;
Lin, Shawn-Yu
;
光電工程學系
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 congruent to 20-40 mu m, 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. (C) 2013 Optical Society of America