Utraviolet Lasing from ZnO Single Crystal at Room Temperature
XIANG Wang-Hua1, ZHANG Gui-Zhong1, SUN Yi2, WANG Gang2, John. B. Ketterson2
1College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072
2Department of Physics and Astronomy, Northwestern University, Evanston, IL60208 USA
Utraviolet Lasing from ZnO Single Crystal at Room Temperature
XIANG Wang-Hua1;ZHANG Gui-Zhong1;SUN Yi2;WANG Gang2;John. B. Ketterson2
1College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072
2Department of Physics and Astronomy, Northwestern University, Evanston, IL60208 USA
Abstract： We experimentally studied ultraviolet photoluminescence (PL) from ZnO (0001) single crystal at room temperature. The PL spectra taken from the sample edge show spectral width narrowing; lifetime shortening (100 ps) and super linear intensity increase with pumping power, while the PL spectra taken from the sample surface only show broad spontaneous emission with a much longer lifetime ( > 5 ns). These findings suggest that stimulated emission and lasing were only achieved at edges of the ZnO single crystal. Scanning-electron-microscopic images show a smooth sample surface morphology and a rougher morphology at the single crystal edge. Electron-hole plasma enhancement of gain may be attributed to the lasing effect observed from the sample edge.
XIANG Wang-Hua;ZHANG Gui-Zhong;SUN Yi;WANG Gang;John. B. Ketterson. Utraviolet Lasing from ZnO Single Crystal at Room Temperature
[J]. 中国物理快报, 2003, 20(2): 296-297.
XIANG Wang-Hua, ZHANG Gui-Zhong, SUN Yi, WANG Gang, John. B. Ketterson. Utraviolet Lasing from ZnO Single Crystal at Room Temperature
. Chin. Phys. Lett., 2003, 20(2): 296-297.
2003, Vol. 20 
