UV and visible upconversion luminescence in Er 3+:YAG under red laser excitation
杨海贵, 戴振文, 祖宁宁
UV and visible upconversion luminescence in Er 3+:YAG under red laser excitation
Yang Hai-Gui(杨海贵), Dai Zhen-Wen(戴振文), and Zu Ning-Ning(祖宁宁)
中国物理B . 2007, (6): 1650 -1654 .  DOI: 10.1088/1009-1963/16/6/027