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Updated: Jun 21, 2026

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal
Published on: October 31, 2019
Excitation-enhanced optical reorientation in nematic liquid crystals
1The State Key Lab for Advanced Photonic Materials and Devices, Department of Optical Science and Engineering, School of Information Science and Engineering, Fudan University, Shanghai 200433, China.
Abstract:
Giant enhancement of optical reorientation in pure nematic liquid crystals (LCs) was observed with a near-resonant input beam. The enhancement observed through reduction of the threshold of the optical Fréedericksz transition in a 28- microm-thick homeotropic LC cell was almost 700 times in comparison with the case of an off-resonant input beam. Wavelength dependence of the enhancement followed the LC absorption spectrum very well, confirming that the enhancement arose from the excitation of LC molecules.
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