Random lasing from dye-doped negative liquid crystals using ZnO nanoparticles as tunable scatters  

作　　者：李龙武 尚真真 邓罗根 

机构地区：[1]School of Physics and Electronic Science,Guizhou Normal University [2]School of Physics,Beijing Institute of Technology

出　　处：《Chinese Physics B》2016年第9期37-41,共5页中国物理B（英文版）

基　　金：Project supported by the Doctoral Science Research Start-up Funding of Guizhou Normal University,China(Grant No.11904-0514162);the National Natural Science Foundation of China(Grant No.11474021)

摘　　要：This work demonstrates the realization of a lasing in scattering media,which contains dispersive solution of Zn O nanoparticles（NPs） and laser dye 4-dicyanomethylene-2-methyle-6-（p-dimethylaminostyryl）-4H-pyran（DCM） in negative liquid crystals（LCs） that was injected into a cell.The lasing intensity of the dye-doped negative LC laser can be tuned from low to high if the NPs concentration is increased.The tunability of the laser is attributable to the clusters-sensitive feature in effective refractive index of the negative LCs.Such a tunable negative liquid crystal laser can be used in the fabrication of new optical sources,optical communication,and liquid crystal laser displays.This work demonstrates the realization of a lasing in scattering media,which contains dispersive solution of Zn O nanoparticles（NPs） and laser dye 4-dicyanomethylene-2-methyle-6-（p-dimethylaminostyryl）-4H-pyran（DCM） in negative liquid crystals（LCs） that was injected into a cell.The lasing intensity of the dye-doped negative LC laser can be tuned from low to high if the NPs concentration is increased.The tunability of the laser is attributable to the clusters-sensitive feature in effective refractive index of the negative LCs.Such a tunable negative liquid crystal laser can be used in the fabrication of new optical sources,optical communication,and liquid crystal laser displays.

关 键 词：random laser negative liquid crystal laser threshold ZnO nanoparticles 

分 类 号：TN24[电子电信—物理电子学]