Birefringent response of graphene oxide film structurized via femtosecond laser  

作　　者：Tingting Zou Bo Zhao Wei Xin Feiyue Wang Hongbo Xie Yuhang Li Yuwei Shan Kun Li Yanbing Sun Jianjun Yang 

机构地区：[1]The GPL Photonics Laboratory,State Key Laboratory of Applied Optics,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China [2]Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China [3]Key Laboratory of UV-Emitting Materials and Technology,Ministry of Education,Northeast Normal University,Changchun 130024,China [4]Department of Electronic Information and Physics,Changzhi University,Changzhi 046011,China [5]Changchun New Industries Optoelectronics Technology Co.,Ltd,Changchun 130103,China

出　　处：《Nano Research》2022年第5期4490-4499,共10页纳米研究（英文版）

基　　金：The research is financially supported by the K.C.Wong Education Foundation(No.GJTD-2018-08);the National Natural Science Foundation of China(Nos.91750205,11674178,and 11804334);the Jilin Provincial Science&Technology Development Project(No.20180414019GH)。

摘　　要：In-plane birefringent materials present an effective modulation of the optical properties and more degrees of freedom for the signal detection in low dimension,and thus remain a hot topic in realizing the integrated,miniature,and flexible devices for multiple applications.Here,the artificial in-plane birefringence properties have been successfully achieved on a graphene oxide film by a novel femtosecond laser lithography method,which provides a high-speed,large-area,and regular subwavelength gratings(~380 nm)fabrication and photoreduction.The obtained sample manifests an evident optical birefringence(~0.18)and anisotropic photoresponse(~1.21)in the visible range,both of which can be significantly modulated by either the structural morphology or the degree of oxide reduction.Based on the analysis of effective-medium theory and measurements of angle-resolved polarized Raman spectroscopy,the artificial in-plane birefringence is originated from various optical responses of the periodic subwavelength structures for the incident light with different polarization states.This technique shows great advantages for the fabrication of integrated in-plane polarization-dependent devices,which is expected to solve the problems in this field,such as the deficient selection of materials,complex design of micro/nanostructure,and inflexible processing technology.

关 键 词：femtosecond laser lithography reduced graphene oxide subwavelength structures in-plane birefringence anisotropic photoresponse 

分 类 号：TQ127.11[化学工程—无机化工]