title: Multichannel Polarization-Controllable Superpositions of Orbital Angular Momentum States.
abstract: A facile metasurface approach is shown to realize polarization-controllable multichannel superpositions of orbital angular momentum (OAM) states with various topological charges. By manipulating the polarization state of the incident light, four kinds of superpositions of OAM states are realized using a single metasurface consisting of space-variant arrays of gold nanoantennas.
authors.affiliation: SUPA, Institute of Photonics and Quantum Sciences, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, UK.
authors.forename: Fuyong
authors.initials: F
authors.lastname: Yue
authors.affiliation: SUPA, Institute of Photonics and Quantum Sciences, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, UK.
authors.forename: Dandan
authors.initials: D
authors.lastname: Wen
authors.affiliation: SUPA, Institute of Photonics and Quantum Sciences, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, UK.
authors.forename: Chunmei
authors.initials: C
authors.lastname: Zhang
authors.affiliation: SUPA, Institute of Photonics and Quantum Sciences, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, UK.
authors.forename: Brian D
authors.initials: BD
authors.lastname: Gerardot
authors.affiliation: SUPA, Institute of Photonics and Quantum Sciences, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, UK.
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
authors.affiliation: School of Physics and Astronomy, University of Birmingham, Birmingham, B15 2TT, UK.
authors.forename: Shuang
authors.initials: S
authors.lastname: Zhang
authors.affiliation: SUPA, Institute of Photonics and Quantum Sciences, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, UK.
authors.forename: Xianzhong
authors.initials: X
authors.lastname: Chen
keywords: metasurfaces; multichannels; orbital angular momentum superpositions