Surface plasmon polaritons in topological insulators

被引：22
作者：
Qi, Junjie [1 ,2 ]
Liu, Haiwen [2 ,3 ,4 ]
Xie, X. C. [2 ,3 ,4 ]
机构：
[1] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China
[2] Collaborat Innovat Ctr Quantum Matter, Beijing, Peoples R China
[3] Peking Univ, Int Ctr Quantum Mat, Beijing 100871, Peoples R China
[4] Peking Univ, Sch Phys, Beijing 100871, Peoples R China
来源：
PHYSICAL REVIEW B | 2014年 / 89卷 / 15期
关键词：
SINGLE DIRAC CONE; GRAPHENE PLASMONICS; TRANSPORT; BI2TE3; LIGHT;
D O I：
10.1103/PhysRevB.89.155420
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We study surface plasmon polaritons on a topological insulator-vacuum interface. When the time-reversal symmetry is broken due to ferromagnetic coupling, the surface states exhibit a magneto-optical Kerr effect. This effect gives rise to a novel transverse-type surface plasmon polariton, in addition to the longitudinal type. In specific, these two types contain three different channels, corresponding to the pole of the determinant of the Fresnel reflection matrix. All three channels of the surface plasmon polaritons display tight confinement and a long lifetime and show strong light-matter coupling with a dipole emitter.
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页数：6
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