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Schematic diagrams of the PILC Fresnel lens in an orthogonally alternating hybrid configuration based on the binary-phase type under (a) no applied voltage and (b) an applied voltage.
Fabrication of the PILC Fresnel lens in an orthogonally alternating hybrid configuration through a single-masking process of photoalignment.
Microscopic textures of the PILC Fresnel lens with orthogonally alternating hybrid zones under crossed polarizers at (a) and (b) .
Dynamic diffraction efficiency of our PILC Fresnel as a function of the applied voltage for an incident light polarized along the axis. Two inset images show the focusing and defocusing properties of the PILC Fresnel lens at 1 and . White solid lines represent the corresponding intensity profiles.
The polar plots of the centrosymmetrical diffraction efficiencies as a function of the polarization state of the incident light for various applied voltages.
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