Frequency-upconverted whispering-gallery-mode lasing in ZnO hexagonal nanodisks.
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.
Zhang
Chunfeng
C
Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.
Zhang
Fan
F
Sun
Xiao Wei
XW
Yang
Yi
Y
Wang
Jian
J
Xu
Jian
J
D000042:Absorption; D007259:Infrared Rays; D007834:Lasers; D049329:Nanostructures / Q000737:chemistry*; D017785:Photons; D014466:Ultraviolet Rays; D015034:Zinc Oxide / Q000737:chemistry*
D015034:Zinc Oxide