Abstract
Low threshold, frequency-upconverted lasing in the two-photon absorption regime was observed in hexa gonal ZnO nanodisks. Upon near-IR excitation, the ZnO nanodisk resonators produced UV laser emission with a remarkably low threshold as well as a resolved lasing linewidth of . Modal analysis and far-field photoluminescence imaging of the nanolasers have suggested the dominance of whispering-gallery modes in the two-photon pumped microcavity lasing process.
© 2009 Optical Society of America
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