Publications

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

Lin, Shawn-Yu L.; Fleming, J.G.; El-Kady, I.

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 A and flat photonic dispersion near the band edges and in a narrow absorption band. © 2003 Optical Society of America.