Structure of the Blue Phase of a Cholesteric Liquid Crystal

1980 ◽  
Vol 44 (13) ◽  
pp. 882-885 ◽  
Author(s):  
S. Meiboom ◽  
M. Sammon
Keyword(s):  
Liquid Crystal ◽  
Cholesteric Liquid Crystal ◽  
Blue Phase

Electron microscopy of a cholesteric liquid crystal and its blue phase

1984 ◽  
Vol 29 (5) ◽  
pp. 2957-2959 ◽  
Author(s):  
M. J. Costello ◽  
S. Meiboom ◽  
M. Sammon
Keyword(s):  
Electron Microscopy ◽  
Liquid Crystal ◽  
Cholesteric Liquid Crystal ◽  
Blue Phase

Electrically Switched Liquid Crystal Color and Device Applications

2010 ◽  
Vol 428-429 ◽  
pp. 24-28
Author(s):  
Shin Ying Lu ◽  
Liang Chy Chien
Keyword(s):  
Liquid Crystal ◽  
Incident Light ◽  
Cholesteric Liquid Crystal ◽  
Blue Shift ◽  
Additive Formulation ◽  
Device Applications ◽  
Blue Phase ◽  
Different Color ◽  
Polymer Stabilized ◽  
Color Filters

We demonstrate a polymer-stabilized cholesteric liquid crystal (PSChLC) where the reflected color can be electrically-switched to reflect a different color at a shorter wavelength (blue-shift). A polymerizable additive formulation is used to ensure a wider range of color tuning and anisotropic reflection where on side reflects and the other side transmits the incident light in response to applied voltage. A second electrically switched color based on polymer-stabilized blue phase (PSBP) liquid crystal is also demonstrated. Applying an electric field across the cell results in a red-shift in Bragg reflected wavelength due to the electrostriction effect. These switchable color devices of are color filters and polarizers free which are suitable for electronic papers.

scholarly journals Effect of Sectional Polymerization Process on Tunable Twist Structure Liquid Crystal Filters

Crystals ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 268
Author(s):  
Changli Sun ◽  
Jiangang Lu
Keyword(s):  
Liquid Crystal ◽  
Cholesteric Liquid Crystal ◽  
Wide Band ◽  
Polymerization Process ◽  
Central Wavelength ◽  
Hyper Spectral ◽  
Phase Liquid ◽  
Blue Phase ◽  
Polymer Stabilized ◽  
Color Filters

The effect of sectional polymerization process on tunable filters with cholesteric liquid crystal (CLC) and blue phase liquid crystal (BPLC) is demonstrated. The bandwidths of the polymer-stabilized cholesteric liquid crystal (PSCLC) and polymer-stabilized blue phase liquid crystal (PSBPLC) filters can be broadened by the holding treatment without distortion. The reflection bandwidth of the CLC filter can be broadened from 120 nm to 220 nm, and that of the BPLC filter can be broadened from 45 nm to 140 nm. Meanwhile, the intensity of reflection can be retained very well. The central wavelength of polymer-stabilized CLC filter can be thermally tuned from 1614 nm to 1460 nm with a stable wide bandwidth. The tunable C-band CLC filter and BPLC filter show great potential application in multi- and hyper-spectral systems and wide-band color filters.

scholarly journals Multi-Wavelength Filters of Templated Blue Phase Liquid Crystal

Crystals ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 451 ◽  
Author(s):  
Shenghao Zha ◽  
Hongzhou Zhang ◽  
Changli Sun ◽  
Yifan Feng ◽  
Jiangang Lu
Keyword(s):  
Liquid Crystal ◽  
Incident Angle ◽  
Incident Light ◽  
Cholesteric Liquid Crystal ◽  
Temperature Shift ◽  
Central Wavelength ◽  
Multi Wavelength ◽  
Phase Liquid ◽  
Blue Phase ◽  
Wavelength Filters

The multi-wavelength filters in the visible light band using the blue phase liquid crystal (BPLC) template was investigated. A multi-layer templated BPLC (T-BPLC) filter without intermediate dielectric layers was fabricated, which may reflect multi-wavelength in one filter. Compared with the cholesteric liquid crystal (CLC) filter, the T-BPLC filter may get a much narrower reflection bandwidth (<15 nm), show better angular stability of incident light, and have a more stable wavelength and bandwidth with a temperature shift. Furthermore, the central wavelength and bandwidth can be easily controlled by the fabrication process and the optimization of the material concentration. When the incident angle varies, the shift of the center wavelength of the T-BPLC filter is much smaller than that of the CLC filter. The multi-wavelength filter shows a potential application in color filters and high-density wavelength division multiplexed networks.

scholarly journals Infiltration of a photonic crystal fiber with cholesteric liquid crystal and blue phase

2014 ◽  
Author(s):  
D. Poudereux ◽  
K. Orzechowski ◽  
O. Chojnowska ◽  
M. Tefelska ◽  
T. R. Woliński ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Cholesteric Liquid Crystal ◽  
Crystal Fiber ◽  
Blue Phase

Dispersion of proton spin-lattice relaxation in a cholesteric liquid crystal

1983 ◽  
Vol 44 (10) ◽  
pp. 1179-1184 ◽  
Author(s):  
M. Vilfan ◽  
R. Blinc ◽  
J. Dolinšek ◽  
M. Ipavec ◽  
G. Lahajnar ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Cholesteric Liquid Crystal ◽  
Lattice Relaxation ◽  
Proton Spin ◽  
Spin Lattice Relaxation ◽  
Spin Lattice
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