Liquid-crystal microlenses with patterned ring-electrode arrays for multiple-mode two-dimensional imaging

2018 ◽  
Author(s):  
Xingwang Xie ◽  
Xinjie Han ◽  
Wanwan Dai ◽  
Zhaowei Xin ◽  
Dong Wei ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Ring Electrode ◽  
Two Dimensional ◽  
Electrode Arrays ◽  
Multiple Mode

Ferroelectric Liquid Crystal Light Valve Using SiO2 / A-Si:H Photodiode

1991 ◽  
Vol 219 ◽  
Author(s):  
T. Horikawa ◽  
S. Tahata ◽  
S. Kaho ◽  
T. Masumi ◽  
N. Mikami ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Dark Conductivity ◽  
Ferroelectric Liquid Crystal ◽  
Two Dimensional ◽  
Metal Insulator ◽  
Resolution Capability ◽  
New Type ◽  
Light Valve ◽  
Mis Diode ◽  
High Photosensitivity

ABSTRACTA new type of ferroelectric liquid crystal light valve (FLCLV) is presented. The design of the FLCLV is based upon the linear equivalent circuit analyses. A photosensor in the FLCLV consists of a metal-insulator-semiconductor (MIS) photodiode. A-Si:H doped with boron and nitrogen [a-Si:(:N:B)] is used in the MIS diode. The a-Si:H(:B:N) film has a dark-conductivity of less than 1×1012 S/cm and a high photosensitivity.Consequently, the writing characteristics of the FLCLV for a two dimensional (2D) image are evaluated. Using writing light of 630 nm and 1 mW/cm2, a high resolution capability of 120∼140 1p/mm is obtained.

Inducing Liquid Crystallinity in Dilute MXene Dispersions for Facile Processing of Multifunctional Fibers

2022 ◽  
Author(s):  
Ken Aldren Aldren Usman ◽  
Jizhen Zhang ◽  
Ya Yao ◽  
Si Qin ◽  
Peter Lynch ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Transition Metal ◽  
Two Dimensional ◽  
Metal Carbides ◽  
Liquid Crystallinity ◽  
Transition Metal Carbides ◽  
Enhanced Properties

The liquid crystal (LC) phases of two-dimensional (2D) transition metal carbides/nitrides (MXenes) has enabled the production of their unique macro-architectures with ordered microstructure and enhanced properties. However, LC phases in...

scholarly journals Variational modelling of nematic elastomer foundations

2018 ◽  
Vol 28 (14) ◽  
pp. 2863-2904
Author(s):  
Pierluigi Cesana ◽  
Andrés A. León Baldelli
Keyword(s):  
Liquid Crystal ◽  
Integral Functional ◽  
Elastic Membrane ◽  
Two Dimensional ◽  
Order Tensor ◽  
Asymptotic Regime ◽  
Liquid Crystal Elastomer ◽  
Energy Functionals ◽  
Shear Energy ◽  
Dimensional Integral

We compute the [Formula: see text]-limit of energy functionals describing mechanical systems composed of a thin nematic liquid crystal elastomer sustaining a homogeneous and isotropic elastic membrane. We work in the regime of infinitesimal displacements and model the orientation of the liquid crystal according to the order tensor theories of both Frank and De Gennes. We describe the asymptotic regime by analysing a family of functionals parametrised by the vanishing thickness of the membranes and the ratio of the elastic constants, establishing that, in the limit, the system is represented by a two-dimensional integral functional interpreted as a linear membrane on top of a nematic active foundation involving an effective De Gennes optic tensor which allows for low order states. The latter can suppress shear energy by formation of microstructure as well as act as a pre-strain transmitted by the foundation to the overlying film.

Electrically tunable photo-aligned two-dimensional liquid crystal polarisation grating

2018 ◽  
Vol 46 (8) ◽  
pp. 1175-1182
Author(s):  
Song-zhen Li ◽  
Zhi-Wei Zhao ◽  
Cheng-Miao Wang ◽  
Qi-dong Wang ◽  
Lishuang Yao ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Two Dimensional

Evidence for a liquid crystal phase transition in two-dimensional electrons in high Landau levels

2002 ◽  
Vol 12 (9) ◽  
pp. 377-380
Author(s):  
K. B. Cooper ◽  
M. P. Lilly ◽  
J. P. Eisenstein ◽  
L. N. Pfeiffer ◽  
K. W. West
Keyword(s):  
Phase Transition ◽  
Liquid Crystal ◽  
Landau Levels ◽  
Crystal Phase ◽  
Two Dimensional ◽  
Liquid Crystal Phase ◽  
Stripe Phase ◽  
Stripe Order ◽  
Crystal Phase Transition ◽  
Liquid Crystal Phase Transition

Transport measurements of high-mohility two-dimensional electron systems at low temperatures have revealed a large resistance anisotropy around half-filling of excited Landau levels. These results have been attributed to electronic stripe-phase formation with spontaneously broken orientational symmetry. Mechanisms which are known to break the orientational symmetry include poorly-understood crystal structure effects and an in-plane magnetic field, $B_{||}$. Here we report that a large $B_{||}$ also causes the transport anisotropy to persist up to much higher temperatures. In this regime, we find that the anisotropic resistance scales sublinearly with $B_{||}/T$. These observations support the proposal that the transition from anisotropic to isotropic transport reflects a liquid crystal phase transition where local stripe order persists even in the isotropic regime.

Monte Carlo study of induced bond orientational ordering in two-dimensional liquid-crystal models

1990 ◽  
Vol 41 (12) ◽  
pp. 6786-6795 ◽  
Author(s):  
M. J. P. Gingras ◽  
P. C. W. Holdsworth ◽  
B. Bergersen
Keyword(s):  
Monte Carlo ◽  
Liquid Crystal ◽  
Monte Carlo Study ◽  
Two Dimensional ◽  
Orientational Ordering

The Role of Two-Dimensional Roughness Element in the Laminar-Turbulent Process in the Favorable Pressure Gradient of the Swept Wing

2014 ◽  
Vol 9 (4) ◽  
pp. 65-73
Author(s):  
Stepan Tolkachev ◽  
Valeria Kaprilevskaya ◽  
Viktor Kozlov
Keyword(s):  
Liquid Crystal ◽  
Roughness Element ◽  
Frequency Interval ◽  
Two Dimensional ◽  
Swept Wing ◽  
Liquid Crystal Thermography ◽  
Roughness Elements ◽  
Favorable Pressure Gradient ◽  
Turbulent Process

In the article using a liquid crystal thermography investigated the development of stationary and secondary disturbances, which were excited by cylindrical and two-dimensional roughness elements. It was shown, that two-dimensional roughness element has a destabilizing effect on disturbances, induced by cylindrical roughness element. Also the twodimensional roughness element is able to excite the stationary structures, and then the secondary disturbances the frequency interval of which is lower than in the case of stationary vortices excitation by cylindrical roughness element

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