Switching of liquid-crystal devices between reflective and transmissive modes using long-pitch cholesteric liquid crystals

2010 ◽  
Vol 35 (20) ◽  
pp. 3504 ◽  
Author(s):  
Ki-Han Kim ◽  
Hye-Jung Jin ◽  
Dong Han Song ◽  
Byoung-Ho Cheong ◽  
Hwan-Young Choi ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Cholesteric Liquid Crystals ◽  
Liquid Crystal Devices

scholarly journals Liquid Crystal Devices for Beam Steering Applications

Micromachines ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 247
Author(s):  
Rowan Morris ◽  
Cliff Jones ◽  
Mamatha Nagaraj
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Adaptive Optics ◽  
Beam Steering ◽  
Optical Components ◽  
Advantages And Disadvantages ◽  
Liquid Crystal Devices

Liquid crystals are valuable materials for applications in beam steering devices. In this paper, an overview of the use of liquid crystals in the field of adaptive optics specifically for beam steering and lensing devices is presented. The paper introduces the properties of liquid crystals that have made them useful in this field followed by a more detailed discussion of specific liquid crystal devices that act as switchable optical components of refractive and diffractive types. The relative advantages and disadvantages of the different devices and techniques are summarised.

scholarly journals Optical Response Associated with the Orientation and Structure of Liquid Crystals with Respect to Phosphatidylcholine Concentration

Crystals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 678
Author(s):  
Yuqi Han ◽  
Yan Jiang ◽  
Wei Guo ◽  
Bing Li ◽  
Lu Zhang ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Reflectance Spectrum ◽  
Optical Response ◽  
The Self ◽  
Cholesteric Liquid Crystals ◽  
Anchoring Effect ◽  
Self Assembling ◽  
Sensitization Effect ◽  
Structure Of Liquid

Based on the anchoring effect due to the self-assembling behavior of the phospholipid molecules at the interface between the liquid crystal and water phases on the orientation of liquid crystals, the optical response associated with the orientation and structure of liquid crystals with respect to the concentration of 1,2-didodecanoyl-sn-glycero-3-phosphocholine solution has been investigated. The optical response owing to changes in the orientation and structure of the mixed cholesteric liquid crystals with respect to the change in the concentration of phosphatidylcholine has been obtained. Moreover, the feasibility of using as-prepared mixed cholesteric liquid crystals to measure the phosphatidylcholine concentration has been verified. A methodology to measure the reflectance spectrum by using mixed cholesteric liquid crystals to sensitize the phosphatidylcholine concentration has been further realized. The sensitization effect of the mixed cholesteric liquid crystals on the measurement of phosphatidylcholine concentration was also verified.

scholarly journals Fabrication of multicolored patterns based on dye-doped cholesteric liquid crystals

2019 ◽  
Vol 18 (7) ◽  
pp. 1638-1648 ◽  
Author(s):  
Linlin Xu ◽  
Hanbing Zhang ◽  
Jie Wei
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Fluorescence Enhancement ◽  
Cholesteric Liquid Crystal ◽  
Cholesteric Liquid Crystals ◽  
Dual Mode

We developed a type of dye-doped cholesteric liquid crystal, which were used for fluorescence enhancement and dual-mode multicolor patterns.

Strong CPL of achiral liquid crystal fluorescent polymer via the regulation of AIE-active chiral dopant

2020 ◽  
Vol 56 (84) ◽  
pp. 12829-12832
Author(s):  
Kerui Liu ◽  
Yihao Shen ◽  
Xiaojing Li ◽  
Yu Zhang ◽  
Yiwu Quan ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Cholesteric Liquid Crystals ◽  
New Strategy ◽  
Polymer Dispersed ◽  
Fluorescent Polymer ◽  
Ternary Polymer

Strong CPL induced by ternary polymer dispersed cholesteric liquid crystals (PD-CLCs) can deliver a new strategy for designing excellent CPL materials.

scholarly journals Applications of Natural Purple from Dolabella auricularia: Colouration of Cholesteric Liquid Crystals

2016 ◽  
Vol 50 ◽  
pp. 1-6
Author(s):  
Yuki Kudo ◽  
Hiromasa Goto
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Cholesteric Liquid Crystal ◽  
Optical Microscope ◽  
Hydroxypropyl Cellulose ◽  
Cholesteric Liquid Crystals ◽  
Optical Texture ◽  
Sea Hare ◽  
Crystal Mixture

Hydroxypropyl cellulose (HPC) as a cholesteric liquid crystal was coloured with purple ink from Dolabella auricularia as a sea hare. Optical texture of the liquid crystal mixture was confirmed with a polarising optical microscope.

Electrically tunable infrared reflector with adjustable bandwidth broadening up to 1100 nm

2016 ◽  
Vol 4 (16) ◽  
pp. 6064-6069 ◽  
Author(s):  
Hitesh Khandelwal ◽  
Michael G. Debije ◽  
Timothy J. White ◽  
Albertus P. H. J. Schenning
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Ethylene Glycol ◽  
Cholesteric Liquid Crystals ◽  
Anisotropic Liquid ◽  
Polymer Stabilized ◽  
Bandwidth Broadening

A tunable infrared reflector has been fabricated using polymer stabilized cholesteric liquid crystals containing a negative dielectric, anisotropic liquid crystal and a long and flexible ethylene glycol twin crosslinker.

scholarly journals Ion-Generating and Ion-Capturing Nanomaterials in Liquid Crystals

Proceedings ◽  
2018 ◽  
Vol 2 (14) ◽  
pp. 1122
Author(s):  
Yuriy Garbovskiy
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Electric Fields ◽  
Future Research ◽  
Research Directions ◽  
Liquid Crystal Devices ◽  
Proposed Model ◽  
Future Research Directions ◽  
Practical Implications ◽  
Good Agreement

The majority of tunable liquid crystal devices are driven by electric fields. The performance of such devices can be altered by the presence of small amounts of ions in liquid crystals. Therefore, the understanding of possible sources of ions in liquid crystal materials is very critical to a broad range of existing and future applications employing liquid crystals. Recently, nanomaterials in liquid crystals have emerged as a hot research topic, promising for its implementation in the design of wearable and tunable liquid crystal devices. An analysis of published results revealed that nanodopants in liquid crystals can act as either ion-capturing agents or ion-generating objects. In this presentation, a recently developed model of contaminated nanomaterials is analyzed. Nanoparticle-enabled ion capturing and ion generation regimes in liquid crystals are discussed within the framework of the proposed model. This model is in very good agreement with existing experimental results. Practical implications and future research directions are also discussed.

scholarly journals Nanoscale hyperspectral imaging of tilted cholesteric liquid crystal structures

Soft Matter ◽  
2019 ◽  
Vol 15 (15) ◽  
pp. 3256-3263 ◽  
Author(s):  
Aurélie Jullien ◽  
Adriana Scarangella ◽  
Umberto Bortolozzo ◽  
Stefania Residori ◽  
Michel Mitov
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Crystal Structures ◽  
Hyperspectral Imaging ◽  
Spectral Properties ◽  
Cholesteric Liquid Crystal ◽  
Cholesteric Liquid Crystals

In tilted cholesteric liquid crystals, hyperspectral imaging reveals the correlation between the bandgap spectral properties and spatial twists.

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