Abstract
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 , 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.
© 2013 Optical Society of America
Full Article | PDF ArticleMore Like This
Shawn-Yu Lin, J. G. Fleming, and I. El-Kady
Opt. Lett. 28(20) 1909-1911 (2003)
Veronika Rinnerbauer, Yi Xiang Yeng, Walker R. Chan, Jay J. Senkevich, John D. Joannopoulos, Marin Soljačić, and Ivan Celanovic
Opt. Express 21(9) 11482-11491 (2013)
Ping Kuang, Alexei Deinega, Mei-Li Hsieh, Sajeev John, and Shawn-Yu Lin
Opt. Lett. 38(20) 4200-4203 (2013)