Graphene Tamm plasmon-induced giant Goos-Hanchen shift at terahertz frequencies

被引:15
|
作者
Tang, Jiao [1 ]
Xu, Jiao [1 ]
Zheng, Zhiwei [1 ,2 ]
Dong, Hu [1 ]
Dong, Jun [1 ]
Qian, Shengyou [1 ]
Guo, Jun [3 ]
Jiang, Leyong [1 ]
Xiang, Yuanjiang [2 ]
机构
[1] Hunan Normal Univ, Sch Phys & Elect, Changsha 410081, Hunan, Peoples R China
[2] Shenzhen Univ, Coll Optoelect Engn, Minist Educ, Int Collaborat Lab 2D Mat Optoelect Sci & Technol, Shenzhen 518060, Peoples R China
[3] Jiangsu Normal Univ, Sch Phys & Elect Engn, Jiangsu Key Lab Adv Laser Mat & Devices, Xuzhou 221116, Jiangsu, Peoples R China
基金
中国国家自然科学基金;
关键词
IMBERT-FEDOROV SHIFTS;
D O I
10.3788/COL201917.020007
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
In this Letter, we have shown that a giant Goos-Hanchen 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-Hanchen 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-Hanchen 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-Hanchen 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.
引用
收藏
页数:6
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