Optical Controlled Switch Behaviour of the ZnS:Cu and SrAl2 O4 :Eu Phosphors
WANG Shao-Min1 , HU Lai-Gui1 , ZHUO Jun1 , ZENG Yue-Wu2
1 Department of Physics, Zhejiang University, Hangzhou 310027
2 The Center of Analysis and Measurement, Zhejiang University, Hangzhou 310028
Optical Controlled Switch Behaviour of the ZnS:Cu and SrAl2 O4 :Eu Phosphors
WANG Shao-Min1 ;HU Lai-Gui1 ;ZHUO Jun1 ;ZENG Yue-Wu2
1 Department of Physics, Zhejiang University, Hangzhou 310027
2 The Center of Analysis and Measurement, Zhejiang University, Hangzhou 310028
关键词 ：
32.50.+d ,
33.50.-j ,
42.79.Ta
Abstract ： We study the effects of a laser beam from the laser diode operating at 980nm on the violet-excited ZnS:Cu and SrAl2 O4 :Eu phosphor powders. Two contrary phenomena, i.e., infrared-induced permanent quenching and short-lived enhancement of phosphorescence, are observed. The defect levels play a significant role in both the processes. It is demonstrated that the phosphorescence induced by the violet beam can be controlled by another infrared beam. The turn-off and turn-on behaviour means that doping luminescent centres into host materials is a considerable way to design a new all-optical switch and may control the output of laser beams in the fibre lasers and optical communications.
Key words ：
32.50.+d
33.50.-j
42.79.Ta
出版日期: 2005-10-01
:
32.50.+d
(Fluorescence, phosphorescence (including quenching))
33.50.-j
(Fluorescence and phosphorescence; radiationless transitions, quenching (intersystem crossing, internal conversion))
42.79.Ta
(Optical computers, logic elements, interconnects, switches; neural networks)
引用本文:
WANG Shao-Min;HU Lai-Gui;ZHUO Jun;ZENG Yue-Wu. Optical Controlled Switch Behaviour of the ZnS:Cu and SrAl2 O4 :Eu Phosphors[J]. 中国物理快报, 2005, 22(10): 2523-2525.
2 O4 :Eu Phosphors. Chin. Phys. Lett., 2005, 22(10): 2523-2525.
链接本文:
https://cpl.iphy.ac.cn/CN/
或
https://cpl.iphy.ac.cn/CN/Y2005/V22/I10/2523
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