[Properties of the stimulated emission in the ZnO thin film].
ZnO thin film is a promising material for short-wave laser and LED etc, due to its high excition binding energy, intense stimulated emission, low lasing threshold, and high working temperature. ZnO thin films were prepared by laser molecular beam epitaxy (L-MBE) in our work. At room-temperature we reported the measurements of absorption spectra and emission spectra of ZnO thin films excited by various optical pumping intensities. High structural perfection of our sample was shown in these figures. We studied the properties and mechanism of stimulated emission in ZnO thin films. The relation between emission intensity and pumping intensity was obtained. Time behaviors of the stimulated emission under relatively high pumping intensity, spontaneous emission, and laser pulses were compared, and hence the stimulated emission of ZnO thin films was proved.
Mei
Zeng-xia
ZX
Institute of Optoelectronic Technology, Key Laboratory of Information Storage and Display, Northern Jiaotong University, Beijing 100044, China.
Zhang
Xi-qing
XQ
Wang
Zhi-jian
ZJ
Wang
Jing
J
Li
Qing-fu
QF
Xu
Xu-rong
XR
D007834:Lasers; D049449:Luminescence; D013057:Spectrum Analysis / Q000379:methods; D013499:Surface Properties; D013696:Temperature; D015034:Zinc Oxide / Q000737:chemistry*
D015034:Zinc Oxide