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Proceedings Paper

Fabrication and bandgap engineering of doped ZnO microspheres by simple laser ablation in air
Author(s): Daisuke Nakamura; Tetsuya Shimogaki; Toshinobu Tanaka; Fumiaki Nagasaki; Yuki Fujiwara; Mitsuhiro Higashihata; Hiroshi Ikenoue; Tatsuo Okada
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Paper Abstract

We synthesized magnesium (Mg)-doped ZnO microspheres by laser ablation of a ZnO sintered target containing magnesium oxide (MgO) with the fundamental of a Nd:YAG laser at 1064 nm. The well-spherical ZnO microcrystals with diameters of 1-20 μm were collected on a substrate which was put near the ablation spot. X-ray diffraction and micro-Raman spectrum indicate that the ZnO microspheres have a crystalline structure. Room-temperature photoluminescence properties of the microsphere were investigated under third harmonic generation of a Nd:YAG laser excitation at 355 nm. An ultraviolet (UV) lasing in whispering gallery mode (WGM) and blue-shift of the UV WGM peaks were observed from the Mg-doped ZnO microsphere.

Paper Details

Date Published: 14 March 2016
PDF: 6 pages
Proc. SPIE 9735, Laser Applications in Microelectronic and Optoelectronic Manufacturing (LAMOM) XXI, 973511 (14 March 2016); doi: 10.1117/12.2214054
Show Author Affiliations
Daisuke Nakamura, Kyushu Univ. (Japan)
Tetsuya Shimogaki, Kyushu Univ. (Japan)
Toshinobu Tanaka, Kyushu Univ. (Japan)
Fumiaki Nagasaki, Kyushu Univ. (Japan)
Yuki Fujiwara, Kyushu Univ. (Japan)
Mitsuhiro Higashihata, Kyushu Univ. (Japan)
Hiroshi Ikenoue, Kyushu Univ (Japan)
Tatsuo Okada, Kyushu Univ. (Japan)

Published in SPIE Proceedings Vol. 9735:
Laser Applications in Microelectronic and Optoelectronic Manufacturing (LAMOM) XXI
Beat Neuenschwander; Stephan Roth; Costas P. Grigoropoulos; Tetsuya Makimura, Editor(s)

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