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  • Title: Polarization-insensitive wavefront shaping using the Pancharatnam-Berry phase.
    Author: Jisha CP, Nolte S, Alberucci A.
    Journal: Opt Lett; 2019 Nov 15; 44(22):5517-5520. PubMed ID: 31730098.
    Abstract:
    We discuss a method to achieve a polarization-independent modulation of the electromagnetic wavefront based upon the Pancharatnam-Berry phase. When the length of the twisted anisotropic material is equal to the birefringence length (i.e., full-wave plate length), a phase delay proportional to the squared transverse derivative of the twisting angle appears. Physically, the phase delay is associated with the Kapitza effect applied to the Pancharatnam-Berry phase. Our theoretical results are confirmed by finite-difference time-domain (FDTD)-based numerical simulations.
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