Unravelling the nonlinear generation of designer vortices with dielectric metasurfaces

Laure Coudrat; Guillaume Boulliard; Jean-Michel Gérard; Aristide Lemaître; Aloyse Degiron; Giuseppe Leo

doi:10.1038/s41377-025-01741-0

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Unravelling the nonlinear generation of designer vortices with dielectric metasurfaces

Original Articles

- Unravelling the nonlinear generation of designer vortices with dielectric metasurfaces
- Unravelling the nonlinear generation of designer vortices with dielectric metasurfaces
- LSA 2025年14卷第3期页码：665-672
- Affiliations：
  
  1.Laboratoire Matériaux et Phénomènes Quantiques, Université Paris Cité and CNRS, Paris 75013, France
  2.Université Grenoble Alpes, CEA, INP, IRIG, PHELIQS, Grenoble 38000, France Full list of author information is available at the end of the article
  3.Centre de Nanosciences et de Nanotechnologies, CNRS - Université Paris-Saclay, Palaiseau 91120, France
  4.Institut universitaire de France (IUF), Paris, France
- Author bio：
  
  Giuseppe Leo (giuseppe.leo@u-paris.fr)
- Funds：
- DOI：10.1038/s41377-025-01741-0
  中图分类号：
- 收稿日期：2024-10-10，
  
  修回日期：2024-12-27，
  
  录用日期：2025-01-02，
  
  网络出版日期：2025-01-16，
  
  纸质出版日期：2025-03-31
- Accepted：
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Unravelling the nonlinear generation of designer vortices with dielectric metasurfaces[J]. LSA, 2025,14(3):665-672.

Coudrat, L. et al. Unravelling the nonlinear generation of designer vortices with dielectric metasurfaces. Light: Science & Applications, 14, 665-672 (2025).
Unravelling the nonlinear generation of designer vortices with dielectric metasurfaces[J]. LSA, 2025,14(3):665-672. DOI： 10.1038/s41377-025-01741-0.

Coudrat, L. et al. Unravelling the nonlinear generation of designer vortices with dielectric metasurfaces. Light: Science & Applications, 14, 665-672 (2025). DOI： 10.1038/s41377-025-01741-0.

摘要

Abstract

Vortex beams are currently drawing a great deal of interest

from fundamental research to several promising applications. While their generation in bulky optical devices limits their use in integrated complex systems

metasurfaces have recently proven successful in creating optical vortices

especially in the linear regime. In the nonlinear domain

of strategic importance for the future of classical and quantum information

to date orbital angular momentum has only been created in qualitative ways

without discussing discrepancies between design and experimental results. Here

we demonstrate and analyze the generation of high-purity second harmonic (SH) optical vortices via dielectric meta-holograms. Through full-wave simulations and a proper fabrication protocol

we achieve efficient frequency doubling of an unstructured pump beam into SH vortices with topological charges from 1 to 10. Interferometric and modal-purity measurements confirm the generation of high-quality SH vortices with minimal deviations from the intended design thanks to a quasi-local control over the SH phase. Through systematic comparisons between experimental data and semi-analytical calculations

we also provide a clear insight into the occurrence of ghost vortices in the metasurface-generated harmonic beams

highlighting the importance of simple designs that can be readily transposed into fabricated devices with high fidelity. Our findings underscore the potential of nonlinear dielectric metasurfaces for versatile structured-light generation and manipulation

paving the way for future developments in integrated photonic systems.

关键词

Keywords

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