论文标题
在螺旋胆固醇液晶中由光扭矩引起的音调调谐
Pitch tuning induced by optical torque in heliconical cholesteric liquid crystals
论文作者
论文摘要
预计，由于其结构允许弯曲和扭曲的分子取向，预计胆汁脱脂液晶体对扭矩更敏感，这与仅涉及扭曲变形的常规胆固醇不同，需要更高的场。我们在这里报告说，在光学扭矩引起的螺旋胆固醇中调整螺旋音高。实验观察结果与对经典理论的期望相一致，以包括光场的效果。实现了螺旋螺距的双重控制，包括沿螺旋轴施加的低频电场和光场正交。
Heliconical cholesteric liquid crystals are expected to be more sensitive to torque induced by light field since their structure allows both bend and twist in molecular orientations, differently from the conventional cholesterics in which only twist deformation is involved, requiring much higher fields. We report here a demonstration of tuning the helical pitch in heliconical cholesterics induced by an optical torque. Experimental observations are in agreement with expectations of the classical theory extended to include the effect of the optical field. A dual control of the helical pitch is achieved including both the low-frequency electric field applied along the helix axis and the optical field orthogonal to it.
