Deep ultraviolet hydrogel based on 2D cobalt-doped titanate  

作　　者：Youan Xu Baofu Ding Ziyang Huang Lixin Dai Peng Liu Bing Li Wei Cai Hui-Ming Cheng Bilu Liu 

机构地区：[1]Xi'an Research Institute of High Technology,Xi'an 710025,China [2]Shenzhen Geim Graphene Center,Tsinghua-Berkeley Shenzhen Institute and Institute of Materials Research,Tsinghua Shenzhen International Graduate School,Tsinghua University,Shenzhen 518055,China [3]Institute of Technology for Carbon Neutrality/Faculty of Materials Science and Engineering,Shenzhen Institute of Advanced Technology,CAS,Shenzhen 518055,China [4]Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China [5]School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,China

出　　处：《Light(Science & Applications)》2023年第1期68-76,共9页光（科学与应用)（英文版）

基　　金：support by the National Natural Science Foundation of China(Grants 51920105002,52273311 and 52125309);the Guangdong Innovative and Entrepreneurial Research Team Program(Grant 2017ZT07C341);the Shenzhen Basic Research Project(Grants JCYJ20190809180605522,and WDZC20200819095319002);the National Key R&D Program(Grant 2018YF A0307200);the National Program on Key Basic Research Project of China(Grant 2020JCJQ-ZD-06312).

摘　　要：Birefringent optical elements that work in deep ultraviolet(DUV)region become increasingly important these years.However,most of the DUV optical elements have fixed birefringence which is hard to be tuned.Here,we invent a birefringence-tunable optical hydrogel with mechano-birefringence effect in the DUV region,based on two-dimensional(2D)low-cobalt-doped titanate.This 2D oxide material has an optical anisotropy factor of 1.5×10^(-11) C^(2)J^(-1) m-1,larger than maximum value obtained previously,leading to an extremely large specific magneto-optical Cotton-Mouton coefficient of 3.9×10^(6) T^(-2) m-1.The extremely large coefficient enables the fabrication of birefringent hydrogel in a small magnetic field with an ultra-low concentration of 2D oxide material.The hydrogel can stably and continuously modulate 303 nm DUV light with large phase tunability by varying the strain(compression or stretching)from 0 to 50%.Our work opens the door to design and fabricate new proof-of-concept DUV birefringence-tunable element,as demonstrated by optical hydrogels capable of DUV modulation by mechanical stimuli.

关 键 词：TUNABLE ULTRAVIOLET COEFFICIENT 

分 类 号：TN3[电子电信—物理电子学]