title: Polarization-Independent Silicon Metadevices for Efficient Optical Wavefront Control.
abstract: We experimentally demonstrate a functional silicon metadevice at telecom wavelengths that can efficiently control the wavefront of optical beams by imprinting a spatially varying transmittance phase independent of the polarization of the incident beam. Near-unity transmittance efficiency and close to 0-2π phase coverage are enabled by utilizing the localized electric and magnetic Mie-type resonances of low-loss silicon nanoparticles tailored to behave as electromagnetically dual-symmetric scatterers. We apply this concept to realize a metadevice that converts a Gaussian beam into a vortex beam. The required spatial distribution of transmittance phases is achieved by a variation of the lattice spacing as a single geometric control parameter.
authors.affiliation: †Nonlinear Physics Centre, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 2601, Australia.
authors.forename: Katie E
authors.initials: KE
authors.lastname: Chong
authors.affiliation: †Nonlinear Physics Centre, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 2601, Australia.
authors.forename: Isabelle
authors.initials: I
authors.lastname: Staude
authors.affiliation: ‡Center for Integrated Nanotechnologies, Sandia National Laboratories, Albuquerque, New Mexico 87185, United States.
authors.forename: Anthony
authors.initials: A
authors.lastname: James
authors.affiliation: ‡Center for Integrated Nanotechnologies, Sandia National Laboratories, Albuquerque, New Mexico 87185, United States.
authors.forename: Jason
authors.initials: J
authors.lastname: Dominguez
authors.affiliation: ‡Center for Integrated Nanotechnologies, Sandia National Laboratories, Albuquerque, New Mexico 87185, United States.
authors.forename: Sheng
authors.initials: S
authors.lastname: Liu
authors.affiliation: ‡Center for Integrated Nanotechnologies, Sandia National Laboratories, Albuquerque, New Mexico 87185, United States.
authors.forename: Salvatore
authors.initials: S
authors.lastname: Campione
authors.affiliation: ‡Center for Integrated Nanotechnologies, Sandia National Laboratories, Albuquerque, New Mexico 87185, United States.
authors.forename: Ganapathi S
authors.initials: GS
authors.lastname: Subramania
authors.affiliation: ‡Center for Integrated Nanotechnologies, Sandia National Laboratories, Albuquerque, New Mexico 87185, United States.
authors.forename: Ting S
authors.initials: TS
authors.lastname: Luk
authors.affiliation: †Nonlinear Physics Centre, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 2601, Australia.
authors.forename: Manuel
authors.initials: M
authors.lastname: Decker
authors.affiliation: †Nonlinear Physics Centre, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 2601, Australia.
authors.forename: Dragomir N
authors.initials: DN
authors.lastname: Neshev
authors.affiliation: ‡Center for Integrated Nanotechnologies, Sandia National Laboratories, Albuquerque, New Mexico 87185, United States.
authors.forename: Igal
authors.initials: I
authors.lastname: Brener
authors.affiliation: †Nonlinear Physics Centre, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 2601, Australia.
authors.forename: Yuri S
authors.initials: YS
authors.lastname: Kivshar
mesh_terms: D004560:Electricity; D008027:Light; D060328:Magnetic Phenomena; D053758:Nanoparticles / Q000737:chemistry*; D055096:Optical Devices; D012542:Scattering, Radiation; D012825:Silicon / Q000737:chemistry*
chemical_list: D012825:Silicon
keywords: Huygens’ surface; Metasurface; beamshaping; electromagnetic duality; metadevice; vortex beam