title: Two-photon excited ultraviolet photoluminescence of zinc oxide nanorods.
abstract: High density zinc oxide nanorods with uniform size were synthesized on (100) silicon substrate by vapor-phase transport method. The scanning electron microscopy images reveal that the nanorods have an average diameter of about 400 nm. The X-ray diffraction pattern demonstrates the wurtzite crystalline structure of the ZnO nanorods growing along [0001] direction. The single-photon excited photoluminescence presents a strong ultraviolet emission band at 394 nm and a weak visible emission band at 600 nm. When the ZnO nanorods were respectively pumped by various wavelength lasers from 520 nm to 700 nm, two-photon excited ultraviolet photoluminescence was observed. The dependence of the two-photon excited photoluminescence intensity on the excitation wavelength and power was investigated in detail.
authors.affiliation: Advanced Photonics Center School of Electronic Science and Engineering, Southeast University, Nanjing 210096, China.
authors.forename: Guangping
authors.initials: G
authors.lastname: Zhu
authors.forename: Chunxiang
authors.initials: C
authors.lastname: Xu
authors.forename: Jing
authors.initials: J
authors.lastname: Zhu
authors.forename: Changgui
authors.initials: C
authors.lastname: Lu
authors.forename: Yiping
authors.initials: Y
authors.lastname: Cui
authors.forename: Xiaowei
authors.initials: X
authors.lastname: Sun
mesh_terms: D003460:Crystallization / Q000379:methods*; D008163:Luminescent Measurements / Q000379:methods*; D046911:Macromolecular Substances / Q000737:chemistry / Q000528:radiation effects; D008422:Materials Testing; D036641:Microscopy, Fluorescence, Multiphoton / Q000379:methods*; D008968:Molecular Conformation / Q000528:radiation effects; D036103:Nanotechnology / Q000379:methods*; D043942:Nanotubes / Q000737:chemistry* / Q000528:radiation effects / Q000648:ultrastructure*; D010316:Particle Size; D010777:Photochemistry / Q000379:methods*; D017785:Photons; D013499:Surface Properties / Q000528:radiation effects; D014466:Ultraviolet Rays; D015034:Zinc Oxide / Q000737:chemistry* / Q000528:radiation effects
chemical_list: D046911:Macromolecular Substances; D015034:Zinc Oxide