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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 14 — Jul. 2, 2012
  • pp: 14857–14863

Photoluminescence and low-threshold lasing of ZnO nanorod arrays

Ni Xu, Yong Cui, Zhigao Hu, Wenlei Yu, Jian Sun, Ning Xu, and Jiada Wu  »View Author Affiliations


Optics Express, Vol. 20, Issue 14, pp. 14857-14863 (2012)
http://dx.doi.org/10.1364/OE.20.014857


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Abstract

We report on the photoluminescence (PL) and lasing characteristics of ZnO nanorod arrays (NRAs) fabricated by hydrothermal process on nanocrystalline ZnO seeded Si and post-growth annealing. The morphology of the ZnO NRAs was examined by field emission scanning electron microscopy and the structure was characterized by x-ray diffraction, Fourier-transform infrared and Raman scattering spectroscopy. The properties of light emission were studied by continuous wave (CW) and 30 ps pulsed ultraviolet excitation. The ZnO NRAs consist of aligned nanorods and are nanocrystalline with wurtzite structure and c-axis orientation. At room temperature, the ZnO NRAs are capable of emitting strong CW PL and pulsed stimulated emission, with the latter showing obvious lasing characteristics. The threshold for lasing was observed to be ~16 kW/cm2.

© 2012 OSA

OCIS Codes
(140.3610) Lasers and laser optics : Lasers, ultraviolet
(140.5960) Lasers and laser optics : Semiconductor lasers
(160.4760) Materials : Optical properties
(160.6000) Materials : Semiconductor materials
(160.4236) Materials : Nanomaterials

ToC Category:
Materials

History
Original Manuscript: April 12, 2012
Revised Manuscript: June 2, 2012
Manuscript Accepted: June 7, 2012
Published: June 18, 2012

Citation
Ni Xu, Yong Cui, Zhigao Hu, Wenlei Yu, Jian Sun, Ning Xu, and Jiada Wu, "Photoluminescence and low-threshold lasing of ZnO nanorod arrays," Opt. Express 20, 14857-14863 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-14-14857


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