Kajkowska, M.; Chychłowski, M.S.; Ertman, S.; Lesiak, P. Dual-Period Polarization-Dependent Diffraction Gratings Based on a Polymer-Stabilized Liquid Crystal. Materials 2023, 16, 7313. https://doi.org/10.3390/ma16237313
Kajkowska, M.; Chychłowski, M.S.; Ertman, S.; Lesiak, P. Dual-Period Polarization-Dependent Diffraction Gratings Based on a Polymer-Stabilized Liquid Crystal. Materials 2023, 16, 7313. https://doi.org/10.3390/ma16237313
Kajkowska, M.; Chychłowski, M.S.; Ertman, S.; Lesiak, P. Dual-Period Polarization-Dependent Diffraction Gratings Based on a Polymer-Stabilized Liquid Crystal. Materials 2023, 16, 7313. https://doi.org/10.3390/ma16237313
Kajkowska, M.; Chychłowski, M.S.; Ertman, S.; Lesiak, P. Dual-Period Polarization-Dependent Diffraction Gratings Based on a Polymer-Stabilized Liquid Crystal. Materials 2023, 16, 7313. https://doi.org/10.3390/ma16237313
Abstract
In this paper we demonstrate first ever dual-period diffraction gratings that do not require electrical tuning to obtain the effect of period change. Our method allows for multiplication of the base period by proper modification of the subsequent slits of the grating. The proposed elements are fabricated by selective photopolymerization of a composite based on nematic liquid crystal. The gratings are formed by polymer stabilization of liquid crystal in different orientations of the molecules in selected grating slits to allow for period manipulation. The operating principle is based on changing the phase delay introduced by the slits depending on polarization direction of incident light with respect to the director in each type of slit, which allows to change the grating’s period. The proposed technique was successfully utilized to obtain diffraction gratings with either doubling or tripling of the period.
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