journal article·2019-10

Coupling‐Mediated Selective Spin‐to‐Plasmonic‐Orbital Angular Momentum Conversion

Quan Xu, Shaojie Ma, Cong Hu, Yuehong Xu, Chunmei Ouyang, Xueqian Zhang, Yanfeng Li, Wentao Zhang, Zhen Tian, Jianqiang Gu, Xixiang Zhang, Shuang Zhang, Jiaguang Han, Weili Zhang

Advanced Optical Materials· Volume 7· Issue 20
Publisher page

Abstract

Abstract Orbital angular momentum (OAM) has been recently introduced to plasmonics for generating plasmonic vortices with a helical wavefront, opening avenues for exotic on‐chip applications such as quantum information processing and communications. In previous demonstrations, carefully designed optical elements are used to convert left‐ and right‐circular polarizations into plasmonic vortices with different topological charges, resulting in conversion from optical spin angular momentum (SAM) to plasmonic OAM. Here, it is demonstrated theoretically and experimentally that by utilizing the near‐field coupling between paired resonators in a metasurface, selective conversion from optical SAM to plasmonic OAM is realized, where generation of plasmonic vortices can be achieved for incident light of one circular polarization while significantly suppressed for the other circular polarization. The proposed design scheme may motivate the design and fabrication of future practical plasmonic devices.
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Research context

OpenAlex topics: Orbital Angular Momentum in Optics · Metamaterials and Metasurfaces Applications · Plasmonic and Surface Plasmon Research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Center for Terahertz Waves and College of Precision Instrument and Optoelectronics Engineering Tianjin University Tianjin 300072 China

Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Optoelectronics Engineering Shenzhen University Shenzhen 518060 China

School of Physics and Astronomy University of Birmingham Birmingham B15 2TT UK

Guangxi Key Laboratory of Automatic Detecting Technology and Instruments Guilin University of Electronic Technology Guilin 541004 China

Physical Science and Engineering Division King Abdullah University of Science and Technology Thuwal 23955‐6900 Saudi Arabia

School of Electrical and Computer Engineering Oklahoma State University Stillwater OK 74078 USA

Funding

National Basic Research Program of China · National Natural Science Foundation of China · China Scholarship Council · Guangxi Key Laboratory of Automatic Detection Technology and Instrument Foundation · King Abdullah University of Science and Technology

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