title: Frequency-upconverted whispering-gallery-mode lasing in ZnO hexagonal nanodisks.
abstract: Low threshold, frequency-upconverted lasing in the two-photon absorption regime was observed in hexagonal ZnO nanodisks. Upon near-IR excitation, the ZnO nanodisk resonators produced UV laser emission with a remarkably low threshold (approximately 1 mJ/cm(2)) as well as a resolved lasing linewidth of approximately 0.1 nm. 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.
authors.affiliation: Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.
authors.forename: Chunfeng
authors.initials: C
authors.lastname: Zhang
authors.forename: Fan
authors.initials: F
authors.lastname: Zhang
authors.forename: Xiao Wei
authors.initials: XW
authors.lastname: Sun
authors.forename: Yi
authors.initials: Y
authors.lastname: Yang
authors.forename: Jian
authors.initials: J
authors.lastname: Wang
authors.forename: Jian
authors.initials: J
authors.lastname: Xu
mesh_terms: D000042:Absorption; D007259:Infrared Rays; D007834:Lasers; D049329:Nanostructures / Q000737:chemistry*; D017785:Photons; D014466:Ultraviolet Rays; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D015034:Zinc Oxide