Electric Control of Spin-Orbit Coupling in Graphene-Based Nanostructures with Broken Rotational Symmetry
| Autor: | Anatoly V. Zayats, Claudio Conti, Andrea Marini, Alessandro Ciattoni |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Angular momentum
Nanostructure Rotational symmetry Nanophotonics Physics::Optics 02 engineering and technology 01 natural sciences plasmonics law.invention 010309 optics law 0103 physical sciences Physics::Atomic and Molecular Clusters nanophotonics optical angular momentum Nanoscopic scale Plasmon Physics Condensed matter physics Graphene Spin–orbit interaction 021001 nanoscience & nanotechnology Condensed Matter Physics Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Astrophysics::Earth and Planetary Astrophysics 0210 nano-technology |
| Zdroj: | Laser & Photonics Reviews Laser & photonics reviews 14 (2020). doi:10.1002/lpor.202000214 info:cnr-pdr/source/autori:Ciattoni A.; Conti C.; Zayats A.V.; Marini A./titolo:Electric Control of Spin-Orbit Coupling in Graphene-Based Nanostructures with Broken Rotational Symmetry/doi:10.1002%2Flpor.202000214/rivista:Laser & photonics reviews (Print)/anno:2020/pagina_da:/pagina_a:/intervallo_pagine:/volume:14 |
| Popis: | Spin and orbital angular momenta of light are important degrees of freedom in nanophotonics which control light propagation, optical forces, and information encoding. Here, it is shown that graphene-supported plasmonic nanostructures with broken rotational symmetry provide a surprising spin to orbital angular momentum conversion, which can be continuously controlled by changing the electrochemical potential of graphene. Upon resonant illumination by a circularly polarized plane wave, a polygonal array of indium-tin-oxide nanoparticles on a graphene sheet generates the scattered field carrying electrically-tunable orbital angular momentum. This unique photonic spin-orbit interaction occurs due to the strong coupling between graphene plasmon polaritons and localized surface plasmons of the nanoparticles and leads to the controlled directional excitation of graphene plasmons. The tuneable spin-orbit conversion paves the way for high-rate information encoding in optical communications, electric steering functionalities in optical tweezers, and nanorouting of higher-dimensional entangled photon states. |
| Databáze: | OpenAIRE |
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