Generation of arbitrary higher order Poincaré beams from a visible metasurface laser

Hend Sroor, Yao Wei Huang, Bereneice Sephton, Darryl Naidoo, Adam Valles, Vincent Ginis, Qiwen Zhan, Cheng Wei Qiu, Antonio Ambrosio, Federico Capasso, Andrew Forbes

Research output: Chapter in Book/Report/Conference proceedingConference paper


The use of beams carrying orbital angular momentum (OAM) has become ubiquitous and topical in a variety of research fields. More recently, there has been a growing interest in exotic OAM carrying beams with spatially variant polarisation, so called Poincaré sphere beams. Structuring these beams at the source gives rise to compact solutions for a myriad of applications, from laser materials processing to microscopy. Here we present a visible laser that control's the angular momentum of light by arbitrary spin-orbit (SO) momentum conversion using novel metasurface devices. Further, we outline how to generate high purity OAM states in a deterministic manner with charge up to 100. Finally, we demonstrate the generation of symmetric and non-symmetric vector vortex beams from the same source with a large OAM differential between modes of up to 90. The performance and versatility in design of our approach offers a route to control light's angular momentum at the source.

Original languageEnglish
Title of host publicationLaser Resonators, Microresonators, and Beam Control XXII
EditorsAlexis V. Kudryashov, Alan H. Paxton, Vladimir S. Ilchenko, Andrea M. Armani
PublisherSPIE Press
ISBN (Electronic)9781510632950
Publication statusPublished - 1 Jan 2020
EventLaser Resonators, Microresonators, and Beam Control XXII 2020 - San Francisco, United States
Duration: 3 Feb 20206 Feb 2020

Publication series

ISSN (Print)0277-786X


ConferenceLaser Resonators, Microresonators, and Beam Control XXII 2020
CountryUnited States
CitySan Francisco


  • Metasurface devices
  • OAM
  • Vector vortex beams

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