Minimizing the polarization leakage of geometric-phasecoronagraphs with multiple grating pattern combinations

@inproceedings{Doelman2020MinimizingTP,
  title={Minimizing the polarization leakage of geometric-phasecoronagraphs with multiple grating pattern combinations},
  author={David S. Doelman and Emiel H. Por and Garreth J. Ruane and Michael J. Escuti and Frans Snik},
  year={2020}
}
  • David S. Doelman, Emiel H. Por, +2 authors Frans Snik
  • Published 2020
  • Physics
  • The design of liquid-crystal diffractive phase plate coronagraphs for ground-based and space-based high-contrast imaging systems is limited by the trade-off between spectral bandwidth and polarization leakage. We demonstrate that by combining phase patterns with a polarization grating (PG) pattern directly followed by one or several separate PGs, we can suppress the polarization leakage terms by additional orders of magnitude by diffracting them out of the beam. \textcolor{black}{Using two PGs… CONTINUE READING

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