TITLE

Random laser action in ZnO nanorod arrays embedded in ZnO epilayers

AUTHOR(S)
Yu, S.F.; Yuen, Clement; Lau, S.P.; Park, W.I.; Gyu-Chul Yi
PUB. DATE
April 2004
SOURCE
Applied Physics Letters;4/26/2004, Vol. 84 Issue 17, p3241
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Random laser action with coherent feedback has been observed in ZnO nanorod arrays embedded in ZnO epilayers. The sample was fabricated by depositing a MgO buffer layer and followed by a layer of ZnO thin film onto a vertically well-aligned ZnO nanorod arrays grown on sapphire substrate. Under 355 nm optical excitation at room temperature, sharp lasing peaks emit at around 390 nm with a linewidth less than 0.4 nm has been observed in all directions. In addition, the dependence of the lasing threshold intensity on the excitation area is shown in good agreement with the random laser theory. Hence, it is demonstrated that random laser action can also be supported in ZnO nanorod arrays. © 2004 American Institute of Physics.
ACCESSION #
12879392

 

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