Jisha, C.P.C.P.JishaNolte, S.S.NolteAlberucci, A.A.Alberucci2022-03-062022-03-062019https://publica.fraunhofer.de/handle/publica/26125010.1364/OL.44.0055172-s2.0-85075051748We 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.en620535journal article