Title: Direct observation of quasi-coherent thermal emission by a three-dimensional metallic photonic crystal
Authors: Hsieh, Mei-Li
Bur, James
Kim, Yong-Sung
Lin, Shawn-Yu
Department of Photonics
Issue Date: 15-Mar-2013
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 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
URI: http://dx.doi.org/10.1364/OL.38.000911
ISSN: 0146-9592
DOI: 10.1364/OL.38.000911
Volume: 38
Issue: 6
Begin Page: 911
End Page: 913
Appears in Collections:Articles