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Highly efficient light emission at λ = 1.5 µm by a three-dimensional tungsten photonic crystal

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Abstract

For what is believed to be the first time, a three-dimensional tungsten photonic crystal is demonstrated to emit light effectively at wavelength λ=1.5 µm. At a bias of V=7 V, the thermal emission exhibits a full width at half-maximum of Δλ=0.85 µm. Within this narrow band, the emitted optical power is 4.5 W and the electrical-to-optical conversion efficiency is 22% per emitting surface. This unique emission is made possible by a large, absolute bandgap in the infrared λ and flat photonic dispersion near the band edges and in a narrow absorption band.

© 2003 Optical Society of America

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