Effect of photoaligning azo dye structure on liquid crystal anchoring energy

2015 ◽  
Vol 23 (10) ◽  
pp. 486-490 ◽  
Author(s):  
Natalya N. Barabanova ◽  
Victor V. Belyaev ◽  
Dmitriy L. Bogdanov ◽  
Vladimir G. Chigrinov ◽  
Artem K. Dadivanyan ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Azo Dye ◽  
Anchoring Energy ◽  
Dye Structure

Effect of Photo-Isomerization of Azo Dyes on the Photonic Bandgap in Chiral Nematics

2011 ◽  
Vol 181-182 ◽  
pp. 257-260
Author(s):  
David Statman ◽  
Andrew Jockers ◽  
Daniel Brennan
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Azo Dyes ◽  
Azo Dye ◽  
Photonic Bandgap ◽  
Methyl Red ◽  
Central Wavelength ◽  
Chiral Nematic ◽  
Anchoring Energy ◽  
Pitch Length

Chiral nematic liquid crystals prepared with Grandjean texture demonstrate a photonic bandgap whose central wavelength is proportional to the pitch length, P, of the liquid crystal and whose width is given by (ne – no)P. We show that methyl red doped chiral nematics undergo a shift in the photonic bandgap upon photo-isomerization. This shift is a result of (1) photo-induced change in anchoring energy on the nematic surface, and (2) change in the natural pitch length from the photo-isomerization of the azo dye.

Measuring liquid crystal anchoring energy strength by spectroscopic ellipsometry

2010 ◽  
Vol 107 (7) ◽  
pp. 073109 ◽  
Author(s):  
A. Marino ◽  
V. Tkachenko ◽  
E. Santamato ◽  
N. Bennis ◽  
X. Quintana ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Spectroscopic Ellipsometry ◽  
Anchoring Energy

Polarization controllable spatial filter based on azo-dye-doped liquid-crystal film

2005 ◽  
Vol 30 (11) ◽  
pp. 1390 ◽  
Author(s):  
Tsung-Hsien Lin ◽  
Andy Y.-G. Fuh
Keyword(s):  
Liquid Crystal ◽  
Azo Dye ◽  
Spatial Filter ◽  
Crystal Film

scholarly journals Anchoring Energy for Nematic Liquid Crystals an Analysis of the Proposed Forms

1984 ◽  
Vol 39 (11) ◽  
pp. 1066-1076 ◽  
Author(s):  
G. Barbero ◽  
N. V. Madhusudana ◽  
G. Durand
Keyword(s):  
Liquid Crystal ◽  
Infinite Series ◽  
Tilt Angle ◽  
Legendre Polynomials ◽  
Fourier Expansion ◽  
Easy Axis ◽  
Practical Interest ◽  
Surface Anchoring ◽  
Functional Forms ◽  
Anchoring Energy

We analyze the proposed functional forms describing the surface anchoring energy of MBBA nematic liquid crystal. Measurements of the surface torque versus tilt angle suggest that the simple cosinus-square form is not adequate for MBBA. The generalized form in an infinite series in cosinus-square is not useful since the set of functions is not orthogonal. Analyses using the orthogonal Legendre polynomials and Fourier expansion are given. Finally we analyse the data in terms of small tilt angles compared to the easy axis, and very far from it, which are the two limits of practical interest.

Color holographic display based on azo-dye-doped liquid crystal (Invited Paper)

2014 ◽  
Vol 12 (6) ◽  
pp. 060003-60006 ◽  
Author(s):  
Xiao Li Xiao Li ◽  
Chao Ping Chen Chao Ping Chen ◽  
Yan Li Yan Li ◽  
Xinhong Jiang Xinhong Jiang ◽  
Hongjing Li Hongjing Li ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Azo Dye ◽  
Holographic Display
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