Helicity dependent directional surface plasmon polariton excitation using a metasurface with interfacial phase discontinuity

被引:496
作者
Huang, Lingling [1 ,2 ]
Chen, Xianzhong [1 ]
Bai, Benfeng [2 ]
Tan, Qiaofeng [2 ]
Jin, Guofan [2 ]
Zentgraf, Thomas [3 ]
Zhang, Shuang [1 ]
机构
[1] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England
[2] Tsinghua Univ, Dept Precis Instruments, State Key Lab Precis Measurement Technol & Instru, Beijing 100084, Peoples R China
[3] Univ Paderborn, Dept Phys, D-33098 Paderborn, Germany
基金
英国工程与自然科学研究理事会; 中国国家自然科学基金;
关键词
metamaterials; metasurface; surface plasmon; BROAD-BAND; LIGHT; EFFICIENT;
D O I
10.1038/lsa.2013.26
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Surface plasmon polaritons (SPPs) have been widely exploited in various scientific communities, ranging from physics, chemistry to biology, due to the strong confinement of light to the metal surface. For many applications, it is important that the free space photon can be coupled to SPPs in a controllable manner. In this Letter, we apply the concept of interfacial phase discontinuity for circularly polarizations on a metasurface to the design of a novel type of polarization-dependent SPP unidirectional excitation at normal incidence. Selective unidirectional excitation of SPPs along opposite directions is experimentally demonstrated at optical frequencies by simply switching the helicity of the incident light. This approach, in conjunction with dynamic polarization modulation techniques, opens gateway towards integrated plasmonic circuits with electrically reconfigurable functionalities.
引用
收藏
页码:e70 / e70
页数:7
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