Effects of chiral dopant on electro-optical properties of nematic liquid crystal cells under in-plane switching and non-uniform vertical electric fields

Abstract

The electro-optical properties of the chiral nematic liquid crystal cell, driven by in-plane switching and non-uniform vertical electric fields, are investigated. The Bragg reflection, threshold voltage, and helical configuration are significantly related with the chiral dopant concentration. Through the driving-mode switching, two bistable helical structures without holding voltages are developed. The behavior of voltage-and temperaturedependent light reflection associated with the helical structure transition is also revealed. A fast bistable switching response (~5 ms) is successfully achieved by the three-terminal-electrode architecture. Further, the proposed cell shows a display time of over 6 hr in the unplugged power state.

Nano-structuration influence on the polyimide-based spatial light modulator’s parameters

“…The effective operation of the LC-SLM is connected with some geometric (constructions, scheme to activate the devices by the external fields) and with the physical-chemical parameters, which regarded not only to the specific native parameters of the modulators, but also depended on the modifications, for example, via nano-structuring of the interface, photo layer or modulating compound [9,13,[28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46] . So, it should be clarified why the study of the parameters of the classical or modified SLMs is so important?…”

Advances in Material Nanosensitization: Refractive Property Changes as the Main Parameter to Indicate Organic Material Physical–Chemical Feature Improvements

“…It is well known that in the past 10–15 years, the influence of nanostructuration on the basic physical and chemical properties of materials, especially on the features of organic ones, is equipped with unique assets [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 ]. Moreover, the modification of the interface with the nanoparticles is also taken into account when researchers discuss the nanocomposites’ properties change [ 18 , 19 , 20 ]. As according to the local opinion of the author of this paper, it is connected with the important dependences between the refractive parameters and the spectral, photoconductive, dynamic, etc., characteristics [ 21 , 22 , 23 ].…”