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基于宇称时间对称结构实现石墨烯光增强吸收
引用本文:易凌俊,李长红. 基于宇称时间对称结构实现石墨烯光增强吸收[J]. 发光学报, 2022, 43(1): 119-128. DOI: 10.37188/CJL.20210322
作者姓名:易凌俊  李长红
作者单位:青岛大学 电子信息学院, 山东 青岛 266071
基金项目:国家自然科学基金(61307050,61701271);山东省自然科学基金(ZR2016AM27)资助项目。
摘    要:为增强石墨烯对近红外通信波段光波的吸收,提出了一种基于周期性宇称-时间(Parity-time)对称结构的石墨烯基吸收器,该结构由顶层的石墨烯层和底层周期性PT对称单元构成.采用传输矩阵方法系统地研究了该结构中石墨烯对1450~1650 nm波长范围内光波的吸收特性.结果表明,通过优化石墨烯复合PT对称微纳结构参数,对...

关 键 词:宇称时间对称  石墨稀  近红外  传输矩阵

Light Enhanced Absorption of Graphene Based on Parity-time Symmetry Structure
YI Ling-jun,LI Chang-hong. Light Enhanced Absorption of Graphene Based on Parity-time Symmetry Structure[J]. Chinese Journal of Luminescence, 2022, 43(1): 119-128. DOI: 10.37188/CJL.20210322
Authors:YI Ling-jun  LI Chang-hong
Affiliation:(College of Electronic Information,Qingdao University,Qingdao 266071,China)
Abstract:To enhance the absorption of graphene for optical waves in near-infrared communication wavelengths,a graphene-based absorber based on a periodic parity-time(PT)symmetry structure was proposed,which consists of the top graphene layer and the underlying periodic PT-symmetry unit.The absorption properties of graphene in the wavelength range of 1450-1650 nm are systematically studied by the transfer matrix method(TMM).The results show that by optimizing the graphene composite PT-symmetry micronano structure parameters,a 35-fold absorptance enhancement was achieved for the normal incidence near-infrared light in the studied wavelength range as compared to the free-standing graphene absorption.Meanwhile,for the oblique incidence near-infrared light with angle ranging from 0°to 30°,the average absorptance of the TE and TM polarization light is also enhanced by 19.7 and 54 folds,respectively.The structure has high-intensity absorption characteristics for the near-infrared light,which can be widely used in the design of devices such as absorbers,photodetectors and infrared optical sensors.
Keywords:parity-time symmetry  graphene  near-infrared  transfer matrix method
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