TITLE

Whispering gallery-mode lasing in ZnO microrods at room temperature

AUTHOR(S)
Dai, J.; Xu, C. X.; Zheng, K.; Lv, C. G.; Cui, Y. P.
PUB. DATE
December 2009
SOURCE
Applied Physics Letters;12/14/2009, Vol. 95 Issue 24, p241110
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
An individual hexagonal ZnO microrod was employed as a whispering-gallery mode (WGM) microcavity to obtain ultraviolet lasing at room temperature. The WGM lasing shows a low threshold, a high quality factor, and distinct mode structure. A typical stimulated emission from the ZnO microrod with diagonal of 6.67 μm exhibits a low lasing threshold of 255 kW/cm2. The observed discrete lasing modes match with the simulated positions very well. The spatial distribution of the lasing intensity demonstrates the lasing output direction and provides the direct evidence of the WGM resonant mechanism. We systematically investigated the lasing performance for different sized microrods.
ACCESSION #
47039152

 

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