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

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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
Pages (from-to)1519-1521
Number of pages3
JournalOptics Letters
Volume34
Issue number10
DOIs
Publication statusPublished - May 15 2009

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ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Khunsin, W., Scharrer, M., Aagesen, L. K., Anderson, M. A., Chang, R. P. H., Torres, C. M. S., & Romanov, S. G. (2009). Resonance amplification of defect emission in ZnO-inverted opal. Optics Letters, 34(10), 1519-1521. https://doi.org/10.1364/OL.34.001519