Five-fold reduction of lasing threshold near the first ΓL-pseudogap of ZnO inverse opals
- Citation data:
Journal of Optics, ISSN: 2040-8978, Vol: 12, Issue: 2, Page: 1
- Publication Year:
- Physics and Astronomy; 3D Photonic Crystals; Opal; Random Laser; ZnO; 3D Photonic Crystals; Opal; Random Laser; ZnO; Physics
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. © 2010 IOP Publishing Ltd.