Optical spin-to-orbital angular momentum conversion in ultra-thin metasurfaces with arbitrary topological charges

  title={Optical spin-to-orbital angular momentum conversion in ultra-thin metasurfaces with arbitrary topological charges},
  author={Fr{\'e}d{\'e}ric Bouchard and Israel De Leon and Sebastian A. Schulz and Jeremy Upham and Ebrahim Karimi and Robert W. Boyd},
  journal={Applied Physics Letters},
Orbital angular momentum associated with the helical phase-front of optical beams provides an unbounded “space” for both classical and quantum communications. Among the different approaches to generate and manipulate orbital angular momentum states of light, coupling between spin and orbital angular momentum allows a faster manipulation of orbital angular momentum states because it depends on manipulating the polarisation state of light, which is simpler and generally faster than manipulating… 

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