Lasing and laser-induced motion of zinc oxide nano-crystals irradiated by ultraviolet laser beam

K. Okazaki, Daisuke Nakamura, M. Higashihata, T. Okada

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The lasing characteristics and the alignment methods of ZnO nanocrystals were investigated for an application to ultraviolet (UV) laser diode (LD). ZnO nanowires and nanosheets were synthesized on a silicon substrate by a CVD method or nanoparticle assisted pulsed-laser deposition (NAPLD), and then those ZnO nanocrystals were examined by a photoluminescence (PL) method with a third-harmonic Nd:YAG laser (355 nm, 5 ns). The observed emission spectra showed the obvious lasing characteristics having mode structure and a threshold for lasing. The threshold power density of a ZnO nanowire and a nanosheet were measured to be 100 kW/cm2 and 5 kW/cm2, respectively. Furthermore, the threshold power was calculated to be 8.4 mW for a ZnO nanowire and 2.5 mW for a ZnO nanosheet. Then the oscillation mechanisms were discussed on those ZnO nanocrystals. We also observed the laser-induced motion (LIM) of ZnO nanocrystals when they were excited by ultraviolet laser beam.

Original languageEnglish
Title of host publicationSynthesis and Photonics of Nanoscale Materials VIII
Volume7922
DOIs
Publication statusPublished - Mar 21 2011
EventSynthesis and Photonics of Nanoscale Materials VIII - San Francisco, CA, United States
Duration: Jan 24 2011Jan 25 2011

Other

OtherSynthesis and Photonics of Nanoscale Materials VIII
CountryUnited States
CitySan Francisco, CA
Period1/24/111/25/11

All Science Journal Classification (ASJC) codes

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Okazaki, K., Nakamura, D., Higashihata, M., & Okada, T. (2011). Lasing and laser-induced motion of zinc oxide nano-crystals irradiated by ultraviolet laser beam. In Synthesis and Photonics of Nanoscale Materials VIII (Vol. 7922). [79220M] https://doi.org/10.1117/12.875793