scholarly journals Photo-Aligned Ferroelectric Liquid Crystal Devices with Novel Electro-Optic Characteristics

Crystals ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 563
Author(s):  
Vladimir Chigrinov ◽  
Qi Guo ◽  
Aleksey Kudreyko
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Berry Phase ◽  
Photonic Devices ◽  
Ferroelectric Liquid Crystal ◽  
Optical Elements ◽  
Ferroelectric Liquid Crystals ◽  
Liquid Crystal Devices ◽  
Alignment Technique ◽  
Photo Alignment

This paper examines different applications of ferroelectric liquid crystal devices based on photo-alignment. Successful application of the photo-alignment technique is considered to be a critical breakthrough. A variety of display and photonic devices with azo dye aligned ferroelectric liquid crystals is presented: smart glasses, liquid crystal Pancharatnam–Berry phase optical elements, 2D/3D switchable lenses, and laser therapy devices. Comparison of electro-optical behavior of ferroelectric liquid crystals is described considering the performance of devices. This paper facilitates the optimization of device design, and broadens the possible applications in the display and photonic area.

scholarly journals The concept of biaxial surface potential and polymer aligning layers in electro-optical cells based on helical nanostructures of ferroelectric liquid crystal

2021 ◽  
Vol 2056 (1) ◽  
pp. 012044
Author(s):  
T P Tkachenko ◽  
A A Zhukov ◽  
E P Pozhidaev
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Surface Potential ◽  
Ferroelectric Liquid Crystal ◽  
Alignment Quality ◽  
Ferroelectric Liquid Crystals ◽  
Helical Pitch

Abstract The paper considers the possibility of controlling the alignment quality of helical nanostructures of ferroelectric liquid crystals (FLCs) within the concept of biaxial surface potential due to variation the FLCs helical pitch p0 and polymer aligning layers structures.

Microphase-Stabilized Ferroelectric Liquid Crystals (MSFLC):  Bistable Switching of Ferroelectric Liquid Crystal−Coil Diblock Copolymers

1998 ◽  
Vol 10 (6) ◽  
pp. 1538-1545 ◽  
Author(s):  
Guoping Mao ◽  
Jianguo Wang ◽  
Christopher K. Ober ◽  
Martin Brehmer ◽  
Mary Jane O'Rourk ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Diblock Copolymers ◽  
Ferroelectric Liquid Crystal ◽  
Ferroelectric Liquid Crystals ◽  
Bistable Switching

scholarly journals Cusp Catastrophe Model for Description of Bistability in Ferroelectric Liquid Crystals

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Nail Migranov ◽  
Aleksey Kudreyko ◽  
Denis Kondratyev
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Theoretical Approach ◽  
Catastrophe Theory ◽  
Azimuthal Angle ◽  
Cusp Catastrophe ◽  
Ferroelectric Liquid Crystal ◽  
Ferroelectric Liquid Crystals ◽  
Catastrophe Model ◽  
Cusp Catastrophe Model

We propose a new theoretical approach for description of the equilibrium and bistable states of ferroelectric liquid crystal. A sample of ferroelectric liquid crystal is considered in the “bookshelf” geometry under the influence of electric field. Continuum and perturbation theories are used in order to establish the relation between the scale coefficients in the expansion for the azimuthal angle. The equilibrium states of ferroelectric SmC* are determined in the framework of the catastrophe theory.

scholarly journals Overlooked Ionic Phenomena Affecting the Electrical Conductivity of Liquid Crystals

2021 ◽  
Vol 11 (1) ◽  
pp. 1
Author(s):  
David Webb ◽  
Yuriy Garbovskiy
Keyword(s):  
Electrical Conductivity ◽  
Liquid Crystal ◽  
Liquid Crystals ◽  
Physical Properties ◽  
Soft Matter ◽  
Photonic Devices ◽  
Optical Components ◽  
Dynamically Reconfigurable ◽  
Liquid Crystal Devices ◽  
New Applications

Liquid crystal devices, such as displays, various tunable optical components, and sensors, are becoming increasingly ubiquitous. Basic physical properties of liquid crystal materials can be controlled by external physical fields, thus making liquid crystal devices dynamically reconfigurable. The tunability of liquid crystals offers exciting opportunities for the development of new applications, including advanced electronic and photonic devices, by merging the concepts of flat optics, tunable metasurfaces, nanoplasmonics, and soft matter biophotonics. As a rule, the tunability of liquid crystals is achieved by applying an electric field. This field reorients liquid crystals and changes their physical properties. Ions, typically present in liquid crystals in minute quantities, can alter the reorientation of liquid crystals through the well-known screening effect. Because the electrical conductivity of thermotropic liquid crystals is normally caused by ions, an understanding of ion generation processes in liquid crystals is of utmost importance to existing and emerging technologies relying on such materials. That is why measuring of electrical conductivity of liquid crystals is a standard part of their material characterization. Measuring the electrical conductivity of liquid crystals is a very delicate process. In this paper, we discuss overlooked ionic phenomena caused by interactions of ions with substrates of the liquid crystal cells. These interactions affect the measured values of the DC electrical conductivity of liquid crystals and make them dependent on the cell thickness.

scholarly journals Ferroelectric liquid crystals with sub-wavelength helix nanostructure pitch for the generation of axial-symmetric vortex light fields

2019 ◽  
Vol 220 ◽  
pp. 01005
Author(s):  
Svetlana Kotova ◽  
Evgeny Pozhidaev ◽  
Sergey Samagin ◽  
Vladimir Kesaev ◽  
Aleksandra Mayorova
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Light Fields ◽  
Phase Plate ◽  
Ferroelectric Liquid Crystal ◽  
Axially Symmetric ◽  
Ferroelectric Liquid Crystals ◽  
Oriented Layer ◽  
Spiral Phase ◽  
Sub Wavelength

Experimental results of the formation of axially symmetric vortex light fields with a frequency of up to 2 kilohertz are presented. The results were obtained by using a 12-sector spiral phase plate (SPP) based on a planar-oriented layer of a 50 μm-thick ferroelectric liquid crystal (FLC), having the spiral nanostructure pitch substantially less than 100 nm.

Ferroelectric Liquid Crystals For Non-Display Applications

1999 ◽  
Vol 559 ◽  
Author(s):  
W. Haase ◽  
D. Ganzke ◽  
E. P. Pozhidaev
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Ferroelectric Liquid Crystal ◽  
Ferroelectric Liquid Crystals ◽  
Liquid Crystal Materials

ABSTRACTA brief review of non-display devises based on ferroelectric liquid crystals (FLC‘s) is presented. The development of ferroelectric liquid crystal materials and corresponding electrooptical elements for non-display applications have been considered.

Polymer Stabilized Bistable Dual Frequency Cholesteric Liquid Crystal Devices Assisted by a Predesigned Chiral Dopant

2021 ◽  
Author(s):  
Chun-Yen Liu ◽  
Chi-Feng Yen ◽  
Yi-Hua Hung ◽  
Chia-Ming Tu ◽  
Guan-Yi Wu ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Cholesteric Liquid Crystal ◽  
Photonic Devices ◽  
Smart Devices ◽  
Dual Frequency ◽  
External Stimulation ◽  
Liquid Crystal Devices ◽  
Polymer Stabilized

Liquid crystals have great potential for developing photonic devices that control the optical behaviors of liquid crystals in smart devices with external stimulation. In this study, we demonstrated a series...

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