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Science 8 June 2001:
Vol. 292. no. 5523, pp. 1897 - 1899
DOI: 10.1126/science.1060367
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Reports

Room-Temperature Ultraviolet Nanowire Nanolasers

Michael H. Huang,1 Samuel Mao,2 Henning Feick,3 Haoquan Yan,1 Yiying Wu,1 Hannes Kind,1 Eicke Weber,3 Richard Russo,2 Peidong Yang13*

Room-temperature ultraviolet lasing in semiconductor nanowire arrays has been demonstrated. The self-organized, <0001> oriented zinc oxide nanowires grown on sapphire substrates were synthesized with a simple vapor transport and condensation process. These wide band-gap semiconductor nanowires form natural laser cavities with diameters varying from 20 to 150 nanometers and lengths up to 10 micrometers. Under optical excitation, surface-emitting lasing action was observed at 385 nanometers, with an emission linewidth less than 0.3 nanometer. The chemical flexibility and the one-dimensionality of the nanowires make them ideal miniaturized laser light sources. These short-wavelength nanolasers could have myriad applications, including optical computing, information storage, and microanalysis.

1 Department of Chemistry, University of California,
2 Environmental Energy Technology Division,
3 Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
*   To whom correspondence should be addressed. E-mail: pyang{at}cchem.berkeley.edu

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