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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 38, Iss. 6 — Mar. 15, 2013
  • pp: 911–913

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

Mei-Li Hsieh, James Bur, Yong-Sung Kim, and Shawn-Yu Lin  »View Author Affiliations

Optics Letters, Vol. 38, Issue 6, pp. 911-913 (2013)

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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 Lcoh(2040)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.

© 2013 Optical Society of America

OCIS Codes
(030.1640) Coherence and statistical optics : Coherence
(030.4070) Coherence and statistical optics : Modes

ToC Category:
Coherence and Statistical Optics

Original Manuscript: February 11, 2013
Manuscript Accepted: February 11, 2013
Published: March 12, 2013

Mei-Li Hsieh, James Bur, Yong-Sung Kim, and Shawn-Yu Lin, "Direct observation of quasi-coherent thermal emission by a three-dimensional metallic photonic crystal," Opt. Lett. 38, 911-913 (2013)

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