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Efficient Metacoupler for Complex Surface Plasmon Launching
Xu, Quan1,2; Zhang, Xueqian1,2; Wei, Minggui1,2; Ren, Guanhua1,2; Xu, Yuehong1,2; Li, Yanfeng1,2; Wang, Huabin3; Ouyang, Chunmei1,2; Han, Jiaguang1,2; Zhang, Weili1,2,4
2018-03-05
摘要Surface plasmons (SPs) promise versatile potential applications in many aspects and thus have been a subject of enormous interest. As the most essential functionality, efficient coupling of free-space light into complex SP field is of particular interest in current research. Most existing methods only focus on either efficient coupling or complex SP field generation, which is insufficient to support the ever-increasing demand of practical applications. Herein, it is demonstrated both theoretically and experimentally that a metasurface composed of properly designed C-shaped slit resonators can function as an efficient SP coupler. More importantly, it is shown that the phase and amplitude of the coupled SPs can be simultaneously manipulated, which would offer considerable design flexibilities for complex SP launching. This methodology can provide a wide platform for the design and fabrication of high-performance plasmonic devices in the future, especially large-area ones in practical applications.
关键词complex launching metacoupler metasurfaces phase discontinuity surface plasmons
DOI10.1002/adom.201701117
发表期刊ADVANCED OPTICAL MATERIALS
ISSN2195-1071
卷号6期号:5页码:9
WOS记录号WOS:000426604700011
语种英语