Direct observation of quasi-coherent thermal emission by a three-dimensional metallic photonic crystal

被引：10
|
作者：
Hsieh, Mei-Li [1 ,2 ,3 ]
Bur, James [2 ,3 ]
Kim, Yong-Sung [2 ,3 ]
Lin, Shawn-Yu [2 ,3 ]
机构：
[1] Natl Chiao Tung Univ, Dept Photon, Hsinchu, Taiwan
[2] Rensselaer Polytech Inst, Future Chips Constellat, Troy, NY 12180 USA
[3] Rensselaer Polytech Inst, Dept Phys Appl Phys & Astron, Troy, NY 12180 USA
来源：
OPTICS LETTERS | 2013年 / 38卷 / 06期
关键词：
LIGHT;
D O I：
10.1364/OL.38.000911
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
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
引用
收藏
页码：911 / 913
页数：3
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