Five-fold reduction of lasing threshold near the first Γl-pseudogap of ZnO inverse opals

Michael Scharrer, Heeso Noh*, Xiaohua Wu, Mark A. Anderson, Alexey Yamilov, Hui Cao, Robert P.H. Chang

*Corresponding author for this work

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

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.

Original languageEnglish (US)
Article number024007
JournalJournal of Optics A: Pure and Applied Optics
Volume12
Issue number2
DOIs
StatePublished - 2010

Keywords

  • 3D photonic crystals
  • Opal
  • Random laser
  • ZnO

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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