Femtosecond Time-Resolved Exciton Recombination Dynamics in ZnO Microcrystallite Thin Films at Room Temperature
ZHANG Wei-li1, CHAI Lu2, XING Qi-rong1, WANG Qing-yue1, K. S . Wong3, Ping Yu3, H. Wang3, Z. K. Tang3, G. K. L, Wong3
1Ultrafast Laser Laboratory, School of Precision Instruments & Optoelectronics Engineering, and Optoelectronic Information Science and Technology Laboratory,
2 School of Science, Tianjin University, Tianjin 300072
3Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, KowJoon, Hong Kong
Femtosecond Time-Resolved Exciton Recombination Dynamics in ZnO Microcrystallite Thin Films at Room Temperature
ZHANG Wei-li1;CHAI Lu2;XING Qi-rong1;WANG Qing-yue1;K. S . Wong3;Ping Yu3;H. Wang3;Z. K. Tang3;G. K. L;Wong3
1Ultrafast Laser Laboratory, School of Precision Instruments & Optoelectronics Engineering, and Optoelectronic Information Science and Technology Laboratory,
2 School of Science, Tianjin University, Tianjin 300072
3Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, KowJoon, Hong Kong
Abstract： We report the femtosecond time-resolved studies of room temperature exciton recombination and ultrafast stimulated emission dynamics in ZnO microcrystallite thin films. A free exciton photoluminescence lifetime of few tens of picoseconds and a decay time of a few picoseconds for the stimulated emission were observed. The relatively slow rise time (3ps) for the P band as the result of exciton-exciton scattering compared with the 0.8 ps rise time for the N band attributed to electron-hole plasma recombination clearly distinguished the two stimulated emission processes.
(Phase conjugation; photorefractive and Kerr effects)
引用本文:
ZHANG Wei-li;CHAI Lu;XING Qi-rong;WANG Qing-yue;K. S . Wong;Ping Yu;H. Wang;Z. K. Tang;G. K. L;Wong. Femtosecond Time-Resolved Exciton Recombination Dynamics in ZnO Microcrystallite Thin Films at Room Temperature[J]. 中国物理快报, 1999, 16(10): 728-730.
ZHANG Wei-li, CHAI Lu, XING Qi-rong, WANG Qing-yue, K. S . Wong, Ping Yu, H. Wang, Z. K. Tang, G. K. L, Wong. Femtosecond Time-Resolved Exciton Recombination Dynamics in ZnO Microcrystallite Thin Films at Room Temperature. Chin. Phys. Lett., 1999, 16(10): 728-730.
1999, Vol. 16 
