中国物理B ›› 2021, Vol. 30 ›› Issue (9): 96103-096103.doi: 10.1088/1674-1056/abf4bf

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Highly tunable plasmon-induced transparency with Dirac semimetal metamaterials

Chunzhen Fan(范春珍)1,†, Peiwen Ren(任佩雯)1, Yuanlin Jia(贾渊琳)1, Shuangmei Zhu(朱双美)2, and Junqiao Wang(王俊俏)1   

  1. 1 School of Physics and Microstructures, Zhengzhou University, Zhengzhou 450001, China;
    2 College of Science, Henan University of Engineering, Zhengzhou 450001, China
  • 收稿日期:2021-01-20 修回日期:2021-03-30 接受日期:2021-04-05 出版日期:2021-08-19 发布日期:2021-08-31
  • 通讯作者: Chunzhen Fan E-mail:chunzhen@zzu.edu.cn
  • 基金资助:
    Project supported by the Natural Science Foundation of Henan Provincial Educational Committee, China (Grant No. 21A140026).

Highly tunable plasmon-induced transparency with Dirac semimetal metamaterials

Chunzhen Fan(范春珍)1,†, Peiwen Ren(任佩雯)1, Yuanlin Jia(贾渊琳)1, Shuangmei Zhu(朱双美)2, and Junqiao Wang(王俊俏)1   

  1. 1 School of Physics and Microstructures, Zhengzhou University, Zhengzhou 450001, China;
    2 College of Science, Henan University of Engineering, Zhengzhou 450001, China
  • Received:2021-01-20 Revised:2021-03-30 Accepted:2021-04-05 Online:2021-08-19 Published:2021-08-31
  • Contact: Chunzhen Fan E-mail:chunzhen@zzu.edu.cn
  • Supported by:
    Project supported by the Natural Science Foundation of Henan Provincial Educational Committee, China (Grant No. 21A140026).

摘要: Based on Dirac semimetal metamaterials, the tunable plasmon induced transparency (PIT) is investigated elaborately in this work. The designed unit cell consists of a strip and a square bracket, which is periodically aligned on the dielectric substrate. Our numerical results illustrate that a pronounced transparency window exists due to near field coupling between two bright modes, which can be dynamically tuned with Fermi energy. Namely, the transparency window demonstrates a distinct blue shift with a larger Fermi energy. Moreover, an on-to-off switch of the PIT transparency window is realized with different polarization angles. In addition, the accompanied slow light property is examined with the calculation of phase and group delay. Finally, a small variation of the refractive index of the substrate can induce a clear movement of the PIT transparency window which delivers a guidance in the application of optical sensing. Thus, this work provides us a new strategy to design compact and adjustable PIT devices and has potential applications in highly tunable optical switchers, sensors, and slow light devices.

关键词: plasmon-induced transparency, Dirac semimetal metamaterials, optical switch, slow light

Abstract: Based on Dirac semimetal metamaterials, the tunable plasmon induced transparency (PIT) is investigated elaborately in this work. The designed unit cell consists of a strip and a square bracket, which is periodically aligned on the dielectric substrate. Our numerical results illustrate that a pronounced transparency window exists due to near field coupling between two bright modes, which can be dynamically tuned with Fermi energy. Namely, the transparency window demonstrates a distinct blue shift with a larger Fermi energy. Moreover, an on-to-off switch of the PIT transparency window is realized with different polarization angles. In addition, the accompanied slow light property is examined with the calculation of phase and group delay. Finally, a small variation of the refractive index of the substrate can induce a clear movement of the PIT transparency window which delivers a guidance in the application of optical sensing. Thus, this work provides us a new strategy to design compact and adjustable PIT devices and has potential applications in highly tunable optical switchers, sensors, and slow light devices.

Key words: plasmon-induced transparency, Dirac semimetal metamaterials, optical switch, slow light

中图分类号:  (Structure of graphene)

  • 61.48.Gh
42.79.Hp (Optical processors, correlators, and modulators) 78.67.Pt (Multilayers; superlattices; photonic structures; metamaterials) 42.50.Gy (Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)