A New Type of Electrohydrodynamic Instability in Nematic Liquid Crystals with Positive Dielectric Anisotropy. I. The Existence of the Charge Injection and the Diffusion Current

1983 ◽  
Vol 52 (11) ◽  
pp. 3773-3781 ◽  
Author(s):  
Masahiro Nakagawa ◽  
Tadashi Akahane
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Charge Injection ◽  
Diffusion Current ◽  
Dielectric Anisotropy ◽  
Electrohydrodynamic Instability ◽  
New Type

A new type of electrohydrodynamic instability in nematic liquid crystals with positive dielectric anisotropy

1993 ◽  
Vol 14 (5) ◽  
pp. 1319-1325 ◽  
Author(s):  
P. R. Kishore ◽  
T. F. S. Raj ◽  
A. W. Iqbal ◽  
S. S. Sastry ◽  
G. Satyanandam
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Dielectric Anisotropy ◽  
Electrohydrodynamic Instability ◽  
New Type

The electrohydrodynamic instability in twisted nematic liquid crystals

1994 ◽  
Vol 4 (2) ◽  
pp. 239-252 ◽  
Author(s):  
A. Hertrich ◽  
A. P. Krekhov ◽  
O. A. Scaldin
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Electrohydrodynamic Instability ◽  
Twisted Nematic

scholarly journals Electrically Controlled Diffraction Grating in Azo Dye-Doped Liquid Crystals

Polymers ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 1051 ◽  
Author(s):  
Chuen-Lin Tien ◽  
Rong-Ji Lin ◽  
Chi-Chung Kang ◽  
Bing-Yau Huang ◽  
Chie-Tong Kuo ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Electric Fields ◽  
Azo Dye ◽  
Nematic Liquid Crystals ◽  
Polarized Light ◽  
Dielectric Anisotropy ◽  
Linear Effect ◽  
Periodic Distribution ◽  
The Difference

This research applies the non-linear effect of azo dye-doped liquid crystal materials to develop a small, simple, and adjustable beam-splitting component with grating-like electrodes. Due to the dielectric anisotropy and optical birefringence of nematic liquid crystals, the director of the liquid crystal molecules can be reoriented by applying external electric fields, causing a periodic distribution of refractive indices and resulting in a diffraction phenomenon when a linearly polarized light is introduced. The study also discusses the difference in the refractive index (Δn), the concentration of azo dye, and the rising constant depending on the diffraction signals. The experimental results show that first-order diffraction efficiency can reach ~18% with 0.5 wt % azo dye (DR-1) doped in the nematic liquid crystals.

Homeotropic alignment of nematic liquid crystals with negative dielectric anisotropy

2010 ◽  
Vol 405 (8) ◽  
pp. 2118-2121 ◽  
Author(s):  
G. Singh ◽  
G. Vijaya Prakash ◽  
A. Choudhary ◽  
A.M. Biradar
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Dielectric Anisotropy ◽  
Homeotropic Alignment
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