Arbitrary polarization conversion for pure vortex generation with a single metasurface

@article{Piccardo2020ArbitraryPC,
  title={Arbitrary polarization conversion for pure vortex generation with a single metasurface},
  author={M. Piccardo and A. Ambrosio},
  journal={Nanophotonics},
  year={2020},
  volume={10},
  pages={727 - 732}
}
Abstract The purity of an optical vortex beam depends on the spread of its energy among different azimuthal and radial modes, also known as ℓ $\ell $ - and p-modes. The smaller the spread, the higher the vortex purity and more efficient its creation and detection. There are several methods to generate vortex beams with well-defined orbital angular momentum, but only few exist allowing selection of a pure radial mode. These typically consist of many optical elements with rather complex… Expand

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