Low-Threshold and High-Extinction-Ratio Optical Bistability within a Graphene-Based Perfect Absorber

被引:3
作者
Zhang, Zhengzhuo
Sun, Qiaoge
Fan, Yansong
Zhu, Zhihong
Zhang, Jianfa
Yuan, Xiaodong
Guo, Chucai [1 ]
机构
[1] Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Peoples R China
基金
中国国家自然科学基金;
关键词
graphene; perfect absorber; optical bistability; nonlinear optics; nanostructure; MONOLAYER-GRAPHENE; INFRARED-ABSORPTION; FILTER; LAYERS;
D O I
10.3390/nano13030389
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A kind of graphene-based perfect absorber which can generate low-threshold and high-extinction-ratio optical bistability in the near-IR band is proposed and simulated with numerical methods. The interaction between input light and monolayer graphene in the absorber can be greatly enhanced due to the perfect absorption. The large nonlinear coefficient of graphene and the strong light-graphene interaction contribute to the nonlinear response of the structure, leading to relatively low switching thresholds of less than 2.5 MW/cm(2) for an absorber with a Q factor lower than 1000. Meanwhile, the extinction ratio of bistable states in the absorber reaches an ultrahigh value of 47.3 dB at 1545.3 nm. Moreover, the influence of changing the structural parameters on the bistable behaviors is discussed in detail, showing that the structure can tolerate structural parametric deviation to some extent. The proposed bistable structure with ultra-compact size, low thresholds, high extinction ratio, and ultrafast response time could be of great applications for fabricating high-performance all-optical-communication devices.
引用
收藏
页数:11
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共 57 条
  • [51] Tailoring the absorption bandwidth of graphene at critical coupling
    Xiao, Shuyuan
    Liu, Tingting
    Wang, Xing
    Liu, Xiaojun
    Zhou, Chaobiao
    [J]. PHYSICAL REVIEW B, 2020, 102 (08)
  • [52] Optical bistability of graphene in PT-symmetric Thue-Morse photonic crystals
    Xu, Haihong
    Qin, Zhongli
    Liu, Fangmei
    Zhong, Dong
    Ni, Hao
    Liu, Fanghua
    [J]. JOURNAL OF MATERIALS SCIENCE, 2022, 57 (12) : 6524 - 6535
  • [53] Simultaneously achieving narrowband and broadband light absorption enhancement in monolayer graphene
    Yan, Zhendong
    Gao, Lei
    Tang, Chaojun
    Lv, Bin
    Gu, Ping
    Chen, Jing
    Zhu, Mingwei
    [J]. DIAMOND AND RELATED MATERIALS, 2022, 126
  • [54] Tunable optical bistability based on Bloch surface waves in one-dimensional photonic crystal with graphene
    Yuan, Hongxia
    Long, Xin
    Zhang, Huayue
    Jiang, Leyong
    Miao, Siyu
    Xiang, Yuanjiang
    [J]. OPTICS COMMUNICATIONS, 2022, 521
  • [55] Z-scan measurement of the nonlinear refractive index of graphene
    Zhang, Han
    Virally, Stephane
    Bao, Qiaoliang
    Ping, Loh Kian
    Massar, Serge
    Godbout, Nicolas
    Kockaert, Pascal
    [J]. OPTICS LETTERS, 2012, 37 (11) : 1856 - 1858
  • [56] Broadband light-trapping enhancement of graphene absorptivity
    Zhang, Xiwen
    John, Sajeev
    [J]. PHYSICAL REVIEW B, 2019, 99 (03)
  • [57] Polarization-insensitive and wide-incident-angle optical absorber with periodically patterned graphene-dielectric arrays
    Zou, Xiujuan
    Zheng, Gaige
    Cong, Jiawei
    Xu, Linhua
    Chen, Yunyun
    Lai, Min
    [J]. OPTICS LETTERS, 2018, 43 (01) : 46 - 49