Experimental setup for fabricating a periodic spatially rotating linear polarization pattern obtained by the interference of two OC polarized beams from an laser (wavelength of ) to produce a 1D polarization hologram.
Simple 2D holographic grating array, obtained by orthogonally overlaying two 1D polarization holograms.
Simulated images of 2D holographic grating array observed between crossed-polarizers [(a) and (b)] and parallel-polarizers [(c) and (d)]. In (b) and (d), the grating vector of the cell makes an angle of 45° with the polarizer.
Simulated diffraction patterns of 2D grating array under (a) and (b) .
POM images of fabricated 2D grating array obtained between crossed-polarizers [(a) and (b)] and parallel-polarizers [(c) and (d)]. In (b) and (d), the grating vector of the cell makes an angle of 45° with the polarizer.
Diffraction patterns of 2D HPG obtained with (a) no analyzer, (b) , and (c) , where and indicate that the polarizer and the analyzer are placed in front of and behind the grating, respectively.
Diffraction efficiencies of zeroth-, U1st-, D1st-, R1st-, and L1st-order beams, measured as analyzer is rotated to make an angle with the polarizer axis.
Variation of diffraction efficiency with applied ac voltage from a 2D HPG, probed using an He–Ne laser.
Polarization modulation patterns produced by the interference of two coherent beams with orthogonal linear (OL) and (OC) polarizations.
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