Advanced control of nonlinear beams with Pancharatnam-Berry metasurfaces

The application of the Pancharatnam-Berry (PB) phase approach to the design of nonlinear metasurfaces has recently enabled subdiffractive phase control over the generated nonlinear fields, embedding phased array features in ultrathin structures. Here, we rigorously model, analyze, and design highly...

Full description

Saved in:
Bibliographic Details
Published in:Physical review. B 2016-12, Vol.94 (21), Article 214303
Main Authors: Tymchenko, M., Gomez-Diaz, J. S., Lee, J., Nookala, N., Belkin, M. A., Alù, A.
Format: Article
Language:English
Subjects:
Angular momentum
Computer simulation
Electron beams
Linear phase
Mathematical models
Metasurfaces
Nonlinear control
Nonlinear optics
Pencil beams
Phase control
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The application of the Pancharatnam-Berry (PB) phase approach to the design of nonlinear metasurfaces has recently enabled subdiffractive phase control over the generated nonlinear fields, embedding phased array features in ultrathin structures. Here, we rigorously model, analyze, and design highly efficient nonlinear metasurfaces with advanced functionalities, including the generation of pencil beams steered in arbitrary directions in space, as well as vortex beams with polarization-dependent angular momentum, and we extend the PB approach to various nonlinear processes. To this purpose, we develop an accurate and efficient theoretical framework-inspired by the linear phase array theory-based on the effective nonlinear susceptibility method, thus avoiding the use of time-consuming numerical simulations. Our findings allow exploiting the flat nonlinear optics paradigm, enabling exciting applications based on subwavelength field control over flat and large-scale structures with giant nonlinear responses.
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.94.214303