3-羟基黄酮的光开关效应  

Optical Switching Effect of 3-hydroxyflavone

作　　者：张桂兰[1] 于雅鑫[1] 李向平[1] 张保[1] 郑肇亮[1] 汤国庆[1] 陈文驹[1] 

机构地区：[1]南开大学现代光学研究所教育部光电子技术科学开放实验室,天津300071

出　　处：《光电子．激光》2004年第7期862-865,共4页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金资助项目(60178025)

摘　　要：利用YAG锁模激光器的三倍频355nm激光做泵浦光,He Ne的632.8nm激光做探测光,研究了具有激发态质子转移效应的有机分子3 羟基黄酮(3 HF)乙醇溶液的全光光开关效应。实验结果表明,3 HF溶液光开关的启动时间很快,是由于分子的激发态质子转移效应引起的,而光开关的恢复时间较缓慢,是由溶液的热弛豫时间所决定,减小光束的光斑尺寸,可以减短光开关的恢复时间。All-optical switching of the organic molecule with excited state proton transfer effect-3-hydroxyflavone(3-HF) in ethanol was investigated by using third-harmonic generation(355 nm) of a mode-locked Nd:YAG laser as a pump beam and a cw He-Ne laser(632.8 nm) as a probe beam.Experimental results showed that the rising time of the optical switching of 3-HF solution was very fast and it was the cause of excited-state proton transfer effect of 3-HF.But　the　recovery time of the optical switching was slow because it was determined by the thermal relaxation of 3-HF solution.The recovery time of the optical switching can be reduced with decrease of the spot size of the incident beam.

关 键 词：3-羟基黄酮 激发态质子转移 全光光开关 恢复时间 

分 类 号：O437[机械工程—光学工程]