Five-Fold Reduction of Lasing Threshold near the First ΓL-Pseudogap of ZnO Inverse Opals
We report room temperature lasing in ZnO inverse opal photonic crystals in the near-ultraviolet (UV) frequency range. We observe random lasing due to disorder in the structures when the photonic pseudogaps are located away from the ZnO gain spectrum. Tuning the first ΓL-pseudogap to the gain peak leads to a five-fold reduction in lasing threshold and a frequency shift of the lasing modes due to the enhanced confinement of light.
M. Scharrer et al., "Five-Fold Reduction of Lasing Threshold near the First ΓL-Pseudogap of ZnO Inverse Opals," Journal of Optics A: Pure and Applied Optics, vol. 12, no. 2, pp. 1-5, Institute of Physics (IOP), Jan 2010.
The definitive version is available at http://dx.doi.org/10.1088/2040-8978/12/2/024007
Keywords and Phrases
3D Photonic Crystals; Opal; Random Laser; ZnO
International Standard Serial Number (ISSN)
Article - Journal
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