• Chinese Optics Letters
  • Vol. 17, Issue 2, 020007 (2019)
Jiao Tang1, Jiao Xu1, Zhiwei Zheng1、2, Hu Dong1, Jun Dong1, Shengyou Qian1, Jun Guo3, Leyong Jiang1、*, and Yuanjiang Xiang2、**
Author Affiliations
  • 1School of Physics and Electronics, Hunan Normal University, Changsha 410081, China
  • 2International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology of Ministry of Education, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
  • 3Jiangsu Key Laboratory of Advanced Laser Materials and Devices, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China
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    Abstract

    In this Letter, we have shown that a giant Goos–H nchen shift of a light beam reflected at terahertz frequencies can be achieved by using a composite structure, where monolayer graphene is coated on one-dimensional photonic crystals separated by a dielectric slab. This giant Goos–H nchen shift originates from the enhancement of the electrical field, owing to the excitation of optical Tamm states at the interface between the graphene and one-dimensional photonic crystal. It is shown that the Goos–H nchen shift in this structure can be significantly enlarged negatively and can be switched from negative to positive due to the tunability of graphene’s conductivity. Moreover, the Goos–H nchen shift of the proposed structure is sensitive to the relaxation time of graphene and the thickness of the top layer, making this structure a good candidate for a dynamic tunable optical shift device in the terahertz regime.
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    Jiao Tang, Jiao Xu, Zhiwei Zheng, Hu Dong, Jun Dong, Shengyou Qian, Jun Guo, Leyong Jiang, Yuanjiang Xiang. Graphene Tamm plasmon-induced giant Goos–Hänchen shift at terahertz frequencies[J]. Chinese Optics Letters, 2019, 17(2): 020007
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    Special Issue: Extraordinary 2D Materials Based Nanophotonics
    Received: Sep. 22, 2018
    Accepted: Dec. 14, 2018
    Published Online: Feb. 14, 2019
    The Author Email: Leyong Jiang (jiangly28@hunnu.edu.cn), Yuanjiang Xiang (xiangyuanjiang@126.com)