Lasing of ZnO micro / nanocrystals by ultraviolet laser excitation and atmospheric alignment with laser-induced motions and electrical field

Kota Okazaki, Tetsuya Shimogaki, Daisuke Nakamura, Mitsuhiro Higashihata, Tatsuo Okada

Research output: Contribution to journalArticle

Abstract

Lasing characteristics and an alignment method of ZnO micro / nanocrystals were investigated for an application to ultraviolet (UV) laser diode (LD). A single ZnO microsheet synthesized by carbothermal chemical vapor deposition method was examined by spectra observation with a third-harmonic Nd:YAG laser (λ = 355 nm, τ = 5 ns) as an excitation laser light. The observed emission spectra showed the lasing characteristics having mode structure and a threshold for lasing at 49 kW/cm2. In addition, laser-induced motions (LIM) of ZnO micro / nanocrystals at high excitation intensity beyond the lasing threshold were observed when those were excited by the UV laser beam at a repetition rate of 20 Hz. The mechanism of the LIM was discussed, and an alignment method of ZnO micro / nanocrystals using the LIM and electrical fields was demonstrated.

Original languageEnglish
Pages (from-to)264-268
Number of pages5
JournalJournal of Laser Micro Nanoengineering
Volume7
Issue number3
DOIs
Publication statusPublished - Nov 1 2012

Fingerprint

Ultraviolet lasers
Laser excitation
ultraviolet lasers
Nanocrystals
lasing
nanocrystals
alignment
Lasers
excitation
lasers
thresholds
Laser beams
Semiconductor lasers
YAG lasers
Chemical vapor deposition
repetition
emission spectra
semiconductor lasers
vapor deposition
laser beams

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

Cite this

Lasing of ZnO micro / nanocrystals by ultraviolet laser excitation and atmospheric alignment with laser-induced motions and electrical field. / Okazaki, Kota; Shimogaki, Tetsuya; Nakamura, Daisuke; Higashihata, Mitsuhiro; Okada, Tatsuo.

In: Journal of Laser Micro Nanoengineering, Vol. 7, No. 3, 01.11.2012, p. 264-268.

Research output: Contribution to journalArticle

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