UV lasing in three-dimensional ZnO photonic crystals is demonstrated at room temperature. The photonic crystals are inverse opals with high refractive index contrast that simultaneously confine light and provide optical gain. Highly directional lasing with tunable wavelength is obtained by optical pumping. Comparison of the experimental results to the calculated band structure shows that lasing occurs in high-order bands with abnormally low group velocity. This demonstrates that the high-order band structure of three-dimensional photonic crystals can be used to effectively confine light and enhance emission. Our findings may also impact other applications of photonic crystal devices. ©2006 American Institute of Physics
M. Scharrer et al., "Ultraviolet Lasing in High-Order Bands of Three-Dimensional ZnO Photonic Crystals," Applied Physics Letters, American Institute of Physics (AIP), Jan 2006.
The definitive version is available at http://dx.doi.org/10.1063/1.2203939
National Science Foundation (U.S.)
Keywords and Phrases
II-VI Semiconductors; Laser Tuning; Photonic Band Gap; Stimulated Emission; Ultraviolet Sources; Wide Band Gap Semiconductors; Optical pumping; Photonic crystals; Refractive index; Semiconductor lasers; Zinc compounds
Article - Journal
© 2006 American Institute of Physics (AIP), All rights reserved.