Abstract
We investigated the optical response times of the LC cells with a nematic liquid crystal with positive dielectric anisotropy doped with 3.5 nm semiconductor quantum dots CdSe/ZnS. We observed that the optical response times of LC cells doped with 1 and 2 mg/ml QDs decreased significantly after one month in comparison with initial. The turn-on time at a wavelength of 1.55 μm of the twist cell with a thickness of 8 μm, filled with the suspension of the LC and 1 mg/ml QDs was about 200 μs. It is shown that using a unipolar square wave voltage decreasing response time of the liquid crystal cell.
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