Five-Fold Reduction of Lasing Threshold near the First $Γ L$-Pseudogap of ZnO Inverse Opals

Details Five-Fold Reduction of Lasing Threshold near the First $Γ L$-Pseudogap of ZnO Inverse Opals Five-Fold Reduction of Lasing Threshold near the First $Γ L$-Pseudogap of ZnO Inverse Opals

2009-07-04

arxiv.org/abs/0907.0736v1

Physics

Optics

10 pages, 6 figures

Scientific paper

We report room temperature lasing in ZnO inverse opal photonic crystals in the near-ultraviolet (UV) frequency. 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 $\Gamma L$-pseudogap to the gain peak leads to a five-fold reduction in lasing threshold and frequency shift of lasing modes due to the enhanced confinement of light.

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