Study on holographic image storage and reconstruction in azo-dye-doped liquid-crystal films

We investigate holographic image storage and reconstruction in the planar Disperse Red 1 (DR1)-doped liquid-crystal films. The nematic liquid crystal 5CB cells doped with Disperse Red 1 (DR1) 1%, 2%, 3%, 4% and 5% by weight are presented. And there is no an electronic field applied to the films. The diffraction efficiency of the probe beam increases with the increase of the dye concentration. The absorptivity of the liquid crystal cell as a function of the angle between the light polarization direction and the liquid-crystal molecular director axis for five different DR1 concentrations is measured at the wavelength of 488nm. We find that the +1st-order and the -1st-order reconstructed images are in centrosymmetric pattern, i.e. they are inverted, and images with readout image quality can be reconstructed from transient hologram recorded in this medium with very short response time of ~10ms. These experimental results show that this medium can be used in optical reconstruction, holographic image reversion or holographic image display.

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