Applied Physics A

, Volume 95, Issue 2, pp 381–385 | Cite as

Multi-photon induced ultraviolet emission from hexagram-shaped ZnO nanorods

  • G. P. Zhu
  • J. Zhu
  • C. X. Xu
  • X. Li
  • J. P. Liu
  • Y. P. Cui
Article

Abstract

Zinc oxide (ZnO) nanorods with hexagram cross-section were prepared by vapor-phase transport method. The growth mechanism of the nanorods was discussed by considering diffusion effects of reactant gasses at high supersaturation. A strong ultraviolet peak at 391 nm and a weak visible band depending on the excitation wavelength were observed under the excitation by infrared femtosecond laser. The UV and the visible emission were respectively attributed to four-photon induced photoluminescence (FPPL) and third harmonic generation (THG). The characteristics and the generation mechanism of the FPPL were discussed.

PACS

73.61.Ga 73.63.Bd 74.25.Gz 42.65.-k 81.10.Bk 

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Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  • G. P. Zhu
    • 1
    • 2
  • J. Zhu
    • 1
  • C. X. Xu
    • 1
  • X. Li
    • 1
  • J. P. Liu
    • 1
  • Y. P. Cui
    • 1
  1. 1.Advanced Photonics Center, School of Electronic Science and EngineeringSoutheast UniversityNanjingChina
  2. 2.Department of PhysicsHuaibei Coal Industry Teachers CollegeHuaibeiChina

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