Unusual thermal emission from a three-dimensional metallic photonic crystal

Shawn-Yu Lin; Mei-Li Hsieh; Rajeev Shenoi; James Bur

doi:10.1117/12.2060757

12 September 2014 Unusual thermal emission from a three-dimensional metallic photonic crystal

Shawn-Yu Lin, Mei-Li Hsieh, Rajeev Shenoi, James Bur

Proceedings Volume 9162, Active Photonic Materials VI; 91621H (2014) https://doi.org/10.1117/12.2060757
Event: SPIE NanoScience + Engineering, 2014, San Diego, California, United States

Abstract

We report the observation of unusual thermal radiation at elevated temperatures (T=400-900K) from a three-dimensional metallic photonic-crystal composite that includes a micro-cavity. Upon thermal excitation by a heating element of a large heat-mass and a constant temperature (heat bath), its emissive power at resonant wavelengths exceeds a blackbody’s at nominally the same surface temperature. The possible explanations include, but are not limited to, angular concentration of light emission, slightly lower lattice-temperature for a reference blackbody and also a significant pumping of hot electrons at resonance such that our sample’s electron-temperature is higher than its latticetemperature.

Citation Download Citation

Shawn-Yu Lin, Mei-Li Hsieh, Rajeev Shenoi, and James Bur "Unusual thermal emission from a three-dimensional metallic photonic crystal", Proc. SPIE 9162, Active Photonic Materials VI, 91621H (12 September 2014); https://doi.org/10.1117/12.2060757

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