title: Experimental observation of anomalous thermal radiation from a three-dimensional metallic photonic crystal.
abstract: We report some striking results on thermal radiation properties of a resonantly coupled cavity photonic crystal (PhC) at elevated temperatures (T = 400-900 K). We experimentally found that at resonant wavelengths, λ = 1.1, 1.64, 2.85 μm, the PhC emission is spectrally selective, quasi-coherent, directional, and shows significant deviation from Planck's blackbody law at equilibrium. The presence of non-equilibrium effects, driven by strong thermal excitation and cavity resonance, may be the major cause for our experimental observation.
authors.affiliation: Department of Photonics, National Chiao-Tung University, Hsinchu, Taiwan. The Future Chips Constellation and Department of Physics, Applied Physics and Astronomy, Rensselaer Polytechnic Institute, Troy, NY 12180, USA.
authors.forename: Mei-Li
authors.initials: ML
authors.lastname: Hsieh
authors.forename: Shawn-Yu
authors.initials: SY
authors.lastname: Lin
authors.forename: James A
authors.initials: JA
authors.lastname: Bur
authors.forename: Rajeev
authors.initials: R
authors.lastname: Shenoi