Liquid crystal optical response dynamics of the flexoelectric effect in a spatially inhomogeneous electric field

1990 ◽  
Vol 7 (1) ◽  
pp. 131-141 ◽  
Author(s):  
A. V. Parfenov ◽  
V. G. Chigrinov
Keyword(s):  
Liquid Crystal ◽  
Electric Field ◽  
Optical Response ◽  
Response Dynamics ◽  
Inhomogeneous Electric Field ◽  
Flexoelectric Effect ◽  
Spatially Inhomogeneous ◽  
Spatially Inhomogeneous Electric Field

scholarly journals Influence of an electric field on flexopolarization induced by acoustic action on a liquid crystal

2021 ◽  
Vol 2131 (5) ◽  
pp. 052006
Author(s):  
O A Denisova
Keyword(s):  
Liquid Crystal ◽  
Electric Field ◽  
Constant Electric Field ◽  
Critical Value ◽  
Thin Layers ◽  
Crystal Thickness ◽  
Positive Potential ◽  
Acoustic Action ◽  
Crystal Sample ◽  
Flexoelectric Effect

Abstract The work experimentally investigated the influence of an electric field on the direct flexoelectric effect that occurs under the influence of an acoustic field in liquid crystals. Thin layers of nematics 10-100 μm thick were studied. In this case, the liquid crystal sample was exposed to the piston method with an acoustic wave with a frequency of 1 kHz. The dependences of the first and second harmonics for different NLCs on the bias voltage value, shear amplitude, and crystal thickness were obtained. It was revealed that the flexosignal harmonics depend on the direction of the electric field; when a positive potential is applied to the movable plate, they take on smaller values than when negative. It was found that in low fields the magnitude of the flexosignal increases due to an increase in the amplitude of the director deviation, but at a critical value of the field it is suppressed, since the layer is stabilized by a constant electric field.

scholarly journals Unexpected electric-field-induced antiferroelectric liquid crystal phase in the SmCα* temperature range and the discrete flexoelectric effect

2019 ◽  
Vol 100 (1) ◽  
Author(s):  
Yoichi Takanishi ◽  
Atsuo Iida ◽  
Neelam Yadav ◽  
A. D. L. Chandani Perera ◽  
Atsuo Fukuda ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Electric Field ◽  
Crystal Phase ◽  
Liquid Crystal Phase ◽  
Temperature Range ◽  
Flexoelectric Effect
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