 |
 |
Journal articles
Generation of Pure OAM Beams with a Single State of Polarization by Antenna-Decorated Microdisk Resonators
Abstract : 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.
https://hal-iogs.archives-ouvertes.fr/hal-03038304
Contributor : Fatima Pereira <>
Submitted on : Thursday, December 3, 2020 - 2:09:09 PM
Last modification on : Tuesday, December 15, 2020 - 3:32:08 AM
Long-term archiving on: : Thursday, March 4, 2021 - 7:14:36 PM
Contributor : Fatima Pereira <>
Submitted on : Thursday, December 3, 2020 - 2:09:09 PM
Last modification on : Tuesday, December 15, 2020 - 3:32:08 AM
Long-term archiving on: : Thursday, March 4, 2021 - 7:14:36 PM
File
acsphotonics.0c01081.pdf
Publisher files allowed on an open archive