COGNÉE, Kévin; DOELEMAN, Hugo; LALANNE, Philippe; KOENDERINK, A

doi:10.1021/acsphotonics.0c01081

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COGNÉE, Kévin
Center for Nanophotonics
Laboratoire Photonique, Numérique et Nanosciences [LP2N]

DOELEMAN, Hugo
Center for Nanophotonics
Van der Waals-Zeeman Institute, University of Amsterdam

LALANNE, Philippe
Laboratoire Photonique, Numérique et Nanosciences [LP2N]

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ACS photonics. 2020-10-14, vol. 7, p. 3049 - 3060

American Chemical Society

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We report waveguide-addressed plasmonic−photonic resonators that generate beams of controlled orbital angular momentum and spin angular momentum content upon driving through a waveguide. From phase-gradient metasurfaces, we borrow the idea of carefully combining multiple nanoscale resonators in a repeat unit, from which we build periodic rings that decorate microdisk resonators. We describe the general mode structure of microdisk cavities perturbed by antenna arrays on the basis of a quasinormal mode formalism and present a strategy to simultaneously control the orbital and spin angular momentum content of light outcoupled to the far field. We propose a realization that uses silicon nitride disks and aluminum nanorod antennas. We find excellent polarization and orbital angular momentum (OAM) purity, as benchmarked by polarization-resolved interferometric Fourier microscopy on single devices.< Leer menos

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3049−3060 Read Online Metrics & More Article Recommendations localized plasmons

microcavities

orbital angular momentum beams

polarization control

hybrid plasmonic−photonic resonators

phase-gradient metasurface

Fourier microscopy

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Generation of Pure OAM Beams with a Single State of Polarization by Antenna-Decorated Microdisk Resonators

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