Microstructured fluorescence in liquid crystals with femtosecond laser excitation  

作　　者：孟霞 金萍 葛士军 刘娇 李炳祥 王磊 陆延青 Xia Meng;Ping Jin;Shijun Ge;Jiao Liu;Bingxiang Li;Lei Wang;Yanqing Lu(College of Electronic and Optical Engineering&College of Flexible Electronics(Future Technology),Nanjing University of Posts and Telecommunications,Nanjing 210023,China;National Laboratory of Solid State Microstructures,College of Engineering and Applied Sciences,Nanjing University,Nanjing 210093,China;State Key Laboratory of Millimeter Waves,Southeast University,Nanjing 210096,China)

机构地区：[1]College of Electronic and Optical Engineering&College of Flexible Electronics(Future Technology),Nanjing University of Posts and Telecommunications,Nanjing 210023,China [2]National Laboratory of Solid State Microstructures,College of Engineering and Applied Sciences,Nanjing University,Nanjing 210093,China [3]State Key Laboratory of Millimeter Waves,Southeast University,Nanjing 210096,China

出　　处：《Chinese Optics Letters》2024年第3期154-158,共5页中国光学快报（英文版）

基　　金：supported by the National Key Research and Development Program of China(No.2022YFA1405000);the Natural Science Foundation of Jiangsu Province(Nos.BK20211277 and BK20210179);the National Natural Science Foundation of China(NSFC)(No.62105143);the Frontier Leading Technology Basic Research Project of Jiangsu Province(No.BK20212004);the Postgraduate Research&Practice Innovation Program of Jiangsu Province(No.KYCX23_0971)。

摘　　要：This study investigated direct fluorescence generation from a nematic liquid crystal(NLC)NJU-LDn-4 under femtosecond laser excitation.The absorption,transmittance,excitation,and emission spectra of the NLC were assessed.The relationship between the femtosecond pump power and fluorescence intensity was analyzed,revealing a quadratic increase and indicating that two-photon absorption(2PA)is the primary fluorescence mechanism.The LC microstructure was designed using photoalignment technology,allowing the generated fluorescence to reflect the corresponding structure.This research can establish a foundation for tunable LC microstructured fluorescence,with potential applications in fluorescence microscopy and optoelectronics.

关 键 词：liquid crystal femtosecond laser FLUORESCENCE MICROSTRUCTURE 

分 类 号：TN249[电子电信—物理电子学] O753.2[理学—晶体学]