Chinese Optics Letters, Vol. 18, Issue 8, 080005 (2020)
Electrically tunable helicity of cholesteric heliconical superstructure [Invited]
Conglong Yuan1, Wenbin Huang1,2, Xiaoqian Wang1, Dong Shen1, and Zhigang Zheng1,3,*
- 1Department of Physics, East China University of Science and Technology, Shanghai 200237, China
- 2School of Optoelectronic Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China
- 3Advanced Materials and Liquid Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University, Kent, Ohio 44242, USA
The dynamic manipulation of the helicity in a cholesteric helical superstructure could enable precise control over its physical and chemical properties, thus opening numerous possibilities for exploring multifunctional devices. When cholesteric material satisfies the sufficiently small bending elastic effect, an electrically induced deformation named the cholesteric heliconical superstructure is formed. Through theoretical and numerical analysis, we systematically studied the tunable helicity of the heliconical superstructure, including the evolution of the corresponding oblique angle and pitch length. To further confirm the optical properties, Berreman’s 4 × 4 matrix method was employed to numerically analyze the corresponding structure reflection under the dual stimuli of chirality and electric field.
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