Abstract

A three-dimensional tungsten photonic crystal is thermally excited and shown to emit light at a narrow band, λ=3.34.25 µm. The emission is experimentally observed to exceed that of the free-space Planck radiation over a wide temperature range, T=475850 K. It is proposed that an enhanced density of state associated with the propagating electromagnetic Bloch waves in the photonic crystal is responsible for this experimental finding.

© 2003 Optical Society of America

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