中国物理B ›› 2022, Vol. 31 ›› Issue (8): 87804-087804.doi: 10.1088/1674-1056/ac6744

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Dual-channel tunable near-infrared absorption enhancement with graphene induced by coupled modes of topological interface states

Zeng-Ping Su(苏增平)1,2, Tong-Tong Wei(魏彤彤)1,2, and Yue-Ke Wang(王跃科)1,2,†   

  1. 1 Optical Information Science and Technology Department, Jiangnan University, Wuxi 214122, China;
    2 Optoelectronic Engineering and Technology Research Center, Jiangnan University, Wuxi 214122, China
  • 收稿日期:2021-10-06 修回日期:2022-03-27 接受日期:2022-04-14 出版日期:2022-07-18 发布日期:2022-07-23
  • 通讯作者: Yue-Ke Wang E-mail:ykwang@jiangnan.edu.cn
  • 基金资助:
    This project was supported by Postgraduate Research & Practice Innovation Program of Jiangsu Province, China (Grant No. KYCX20 1929).

Dual-channel tunable near-infrared absorption enhancement with graphene induced by coupled modes of topological interface states

Zeng-Ping Su(苏增平)1,2, Tong-Tong Wei(魏彤彤)1,2, and Yue-Ke Wang(王跃科)1,2,†   

  1. 1 Optical Information Science and Technology Department, Jiangnan University, Wuxi 214122, China;
    2 Optoelectronic Engineering and Technology Research Center, Jiangnan University, Wuxi 214122, China
  • Received:2021-10-06 Revised:2022-03-27 Accepted:2022-04-14 Online:2022-07-18 Published:2022-07-23
  • Contact: Yue-Ke Wang E-mail:ykwang@jiangnan.edu.cn
  • Supported by:
    This project was supported by Postgraduate Research & Practice Innovation Program of Jiangsu Province, China (Grant No. KYCX20 1929).

摘要: The dual-channel nearly perfect absorption is realized by the coupled modes of topological interface states (TIS) in the near-infrared range. An all-dielectric layered heterostructure composed of photonic crystals (PhC)/graphene/PhC/graphene/PhC on GaAs substrate is proposed to excite the TIS at the interface of adjacent PhC with opposite topological properties. Based on finite element method (FEM) and transfer matrix method (TMM), the dual-channel absorption can be modulated by the periodic number of middle PhC, Fermi level of graphene, and angle of incident light (TE and TM polarizations). Especially, by fine-tuning the Fermi level of graphene around 0.4 eV, the absorption of both channels can be switched rapidly and synchronously. This design is hopefully integrated into silicon-based chips to control light.

关键词: one-dimensional photonic crystals, graphene, topological interface states

Abstract: The dual-channel nearly perfect absorption is realized by the coupled modes of topological interface states (TIS) in the near-infrared range. An all-dielectric layered heterostructure composed of photonic crystals (PhC)/graphene/PhC/graphene/PhC on GaAs substrate is proposed to excite the TIS at the interface of adjacent PhC with opposite topological properties. Based on finite element method (FEM) and transfer matrix method (TMM), the dual-channel absorption can be modulated by the periodic number of middle PhC, Fermi level of graphene, and angle of incident light (TE and TM polarizations). Especially, by fine-tuning the Fermi level of graphene around 0.4 eV, the absorption of both channels can be switched rapidly and synchronously. This design is hopefully integrated into silicon-based chips to control light.

Key words: one-dimensional photonic crystals, graphene, topological interface states

中图分类号:  (Multilayers; superlattices; photonic structures; metamaterials)

  • 78.67.Pt
42.70.Qs (Photonic bandgap materials) 42.25.Bs (Wave propagation, transmission and absorption) 78.67.Wj (Optical properties of graphene)