Dresden 2009 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 51: Photonic crystals II
HL 51.9: Talk
Friday, March 27, 2009, 12:30–12:45, BEY 154
Thermal Emission in Photonic Crystals — •Christian Schuler1, Marian Florescu2, Christian Wolff1,3,4, Sabine Essig1,3,4, Thomas Zebrowski1,4, and Kurt Busch1,3,4 — 1Institut für Theoretische Festkörperphysik, Universität Karlsruhe — 2Department of Physics, Princeton University — 3DFG Forschungszentrum Center for Functional Nanostructures (CFN), Universität Karlsruhe — 4Karlsruhe School of Optics & Photonics (KSOP), Universität Karlsruhe
Photonic crystals (PCs) exhibit great potential for technological applications that are based on the conversion from energy to light, for example energy-efficient light sources or improved devices for thermophotovoltaics. We analyze the spectral and angular dependence of the thermal radiation emitted from a semi-infinite two-dimensional PC into free space. The emitted light originates from thermally excited Bloch modes, which are obtained from the PC’s complex bandstructure. The Bloch modes are coupled to the free space plane waves by a scattering matrix approach. Our results are in good agreement with Kirchhoff’s law of thermal radiation and obey the black body limit.