Resonance amplification of defect emission in ZnO-inverted opal

Worawut Khunsin, Michael Scharrer, Larry K. Aagesen, Mark A. Anderson, Robert P.H. Chang, Clivia M.Sotomayor Torres, Sergei G. Romanov

Research output: Contribution to journalArticlepeer-review

Abstract

Transformation of broadband emission of oxygen defects in the carcass of ZnO-inverted opal into a multiple- mode amplified spontaneous emission band has been observed in the spectral interval of a photonic bandgap upon increasing excitation intensity. The mode structure has been assigned to amplification of emission coupled to resonance modes of the self-selected distributed Bragg resonator. The surprisingly low 2 W/cm2onset of amplification has been explained by the long radiative decay time of defect states populated according to the three-level excitation scheme. The decrease of emission intensity between amplified peaks has been associated with the saturation of the ZnO defect emission.

Original languageEnglish (US)
Pages (from-to)1519-1521
Number of pages3
JournalOptics Letters
Volume34
Issue number10
DOIs
StatePublished - May 15 2009

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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