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Proceedings Paper

Lasing with the shortest wavelength in substituted ZnO and lasing of ZnO microcrystal or scattering gain medium in closed microcavity
Author(s): Cai-Rong Ding; Bing-Chu Chen; Shu-Wei Li; He-Zhou Wang
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Paper Abstract

At pulse laser pumping, stimulated emissions are observed in ZnxMg1-xO epilayers. Among them, spectral blue shifts are dependent on the Mg substitution concentration; and the highest lasing photon energy (in ZnO series materials even reported) of 3.51 eV is observed. Furthermore, experimental results also show that by high concentration Mg substitution, a red shift of the electron-hole plasma stimulated emission is reduced and its efficiency doesn't decrease with the Mg substitution concentration. These results imply that the lasing frequency of ZnO series materials can be modified by substitution. Secondly, lasing with low threshold in a closed micro-cavity filling with high scattering and irregular structure gain medium is observed. Furthermore, the usual laser physics and random laser can't explain the sharp bandwidth of lasing in sub-micron ZnO micro-crystals; a new concept of lasing needs to be proposed, which is important to the develop in physics of carrier and lasing.

Paper Details

Date Published: 20 November 2007
PDF: 8 pages
Proc. SPIE 6828, Light-Emitting Diode Materials and Devices II, 682813 (20 November 2007); doi: 10.1117/12.767911
Show Author Affiliations
Cai-Rong Ding, Sun Yat-Sen Univ. (China)
Bing-Chu Chen, Sun Yat-Sen Univ. (China)
Shu-Wei Li, Sun Yat-Sen Univ. (China)
He-Zhou Wang, Sun Yat-Sen Univ. (China)

Published in SPIE Proceedings Vol. 6828:
Light-Emitting Diode Materials and Devices II
Jian Wang; Changhee Lee; Hezhou Wang, Editor(s)

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