石墨烯缺陷对光子晶体光吸收特性的调制  

The modulation effect of graphene defects on the light absorption properties of photonic crystals

作　　者：赵宏斌 苏安[1] 尹向宝 蒙成举[1] 江思婷 高英俊[2] ZHAO Hong-bin;SU An;YIN Xiang-bao;MENG Cheng-ju;JIANG Si-ting;GAO Ying-ju(Institute of Mathematical,Hechi University,Guangxi Yizhou 546300,China;College of Physical Science and Engineering,Guangxi University,Guangxi Nanning 530004,China)

机构地区：[1]河池学院数理学院,广西宜州546300 [2]广西大学物理科学与工程技术学院,广西南宁530004

出　　处：《中国光学》2022年第3期418-425,共8页Chinese Optics

基　　金：国家自然科学基金(No.51161003);河池学院2018年高层次人才科研启动费项目(No.XJ2018GKQ017);河池学院2020年校级科研项目(No.2020XJZC001)。

摘　　要：通过构造含石墨烯缺陷光子晶体结构模型(ACG^(K1)CB)^(N)CG^(K)C(BCG^(K2)CA)^(M),利用传输矩阵法理论和计算机模拟仿真的方式,研究了石墨烯缺陷对光子晶体光吸收特性的调制作用。当光子晶体中引入石墨烯缺陷后,光子晶体的光吸收率增强,并出现明显的窄带吸收峰。随着周期数M或K_(2)增大,光子晶体的光吸收率增强,当M=6时吸收率达到96.55%,当K_(2)=4时吸收率达到43.30%,而且吸收峰随M增大向短波方向移动,但随K_(2)增大向长波方向移动。随着周期数K增大,光子晶体的光吸收率先增大到极大值后再减弱,且吸收峰向短波方向移动。随着A介质层(硅单质)厚度d_(A)的增大,光子晶体的光吸收率增强,当d_(A)=178.25 nm时吸收率达到48.54%,且吸收峰向长波方向移动;随着B、C介质层(分别为四氯化碳和砷化镓)厚度d_(B)、d_(C)增大,光子晶体的光吸收率减弱,当d_(B)=178.25 nm时吸收率为33.12%,当d_(C)=155.25 nm时吸收率为25.89%,且吸收峰向长波方向移动。随着光入射角θ增大,光子晶体的光吸收率先增大到极大值后再减弱,且吸收峰向短波方向移动。研究结果表明石墨烯缺陷对光子晶体光吸收特性具有很好的调制作用,为新型光学吸收器、滤波器和全反射器等材料研究和选择提供理论参考。The structure model(ACG^(K1)CB)^(N)CG^(K)C(BCG^(K2)CA)^(M) of photonic crystal with graphene defect is constructed and the modulation effect of graphene defects on the light absorption characteristics of photonic crystals is studied by transfer matrix method and computer simulation.When graphene defect are introduced into the photonic crystal,the optical absorptivity of the photonic crystal are enhanced and an obvious narrow-band absorption peak appears.With the increase of period number M or K_(2),the optical absorptivity increases.When M=6,the absorptivity is 96.55%,when K_(2)=4,the absorptivity is 43.30%.The absorption peak moves towards the short wave with the increase of M while towards the long wave with the increase of K_(2).With the increase of the period number K,the light absorption of photonic crystal increases to the maximum value first and then decreases,and the absorption peak moves towards the short wave.As d_(A),the thickness of A medium layer(monatomic silicon)increases,the optical absorptivity of photonic crystal is enhanced.When d_(A)=178.25 nm,the absorptivity is 48.54%,and the absorption peak moves to the long wave direction;With the increase of the thickness d_(B)of B(carbon tetrachloride)and d_(C)of C(gallium arsenide)dielectric layer,the optical absorptivity of photonic crystals decreases.When d_(B)=178.25 nm,the absorptivity is 33.12%,when d_(C)=155.25 nm,the absorptivity is 25.89%,and the absorption peak moves to long wave direction.With the increase of incident angleθ,the optical absorptivity of photonic crystal first increases to the maximum and then decreases,and the absorption peak moves in the short wave direction.The result shows that graphene defects have a good modulation effect on the light absorption characteristics of photonic crystals,which provides a theoretical reference for the research and selection of novel optical absorbers,filters and total reflectors.

关 键 词：石墨烯 光子晶体 缺陷 光学吸收 调制 

分 类 号：O613.71[理学—无机化学] O734[理学—化学]