普洱茶的非线性光学效应与光速调控  

The nonlinear optical effect and group velocity control in Pu-erh tea solution

作　　者：唐柏权[1,2] 向吟啸[1,2] 张文定[1,2] 高峰[1,2] 齐继伟[1,2] 王振华[1,2] 张心正[1,2] 张国权[1,2] 许京军[1,2] 

机构地区：[1]南开大学物理科学学院光子学中心,天津300071 [2]南开大学弱光非线性光子学教育部重点实验室,天津300457

出　　处：《科学通报》2010年第1期15-19,共5页Chinese Science Bulletin

基　　金：弱光非线性光子学科学与技术创新引智基地(编号:B07013);国家重点基础研究发展计划(编号:2007CB307002);教育部科技创新工程重大项目培育资金项目(编号:708022);天津市国际科技合作项目(编号:06YFGHHZ00800)资助

摘　　要：利用Z扫描方法研究了普洱茶的非线性光学效应,发现普洱茶水溶液在连续光下具有很高的非线性折射率,与CS2相比高达6个数量级,尤其是在普洱茶水溶液中观察到了光速减慢到超光速的转换过程,实验结果显示了光波位相耦合色散效应导致光速变化机制的普适性.The nonlinear optical effect of the Pu-erh tea solution of water was studied by Z-scan technique,and a high nonlinear refractive index was found with continuous laser,which was six orders of magnitude larger than that of CS2.Especially,a conversion from subluminal light to superluminal light was observed in our sample,which demonstrates that the controlling of the group velocity of light based on the dispersive effect of phase coupling is applicable widely to nonlinear materials.

关 键 词：普洱茶 非线性 光速 色散 

分 类 号：TS272.5[农业科学—茶叶生产加工]