Self‐focusing of laser light in the isotropic phase of a nematic liquid crystal

1973 ◽  
Vol 23 (10) ◽  
pp. 539-540 ◽  
Author(s):  
D. V. G. L. Narasimha Rao ◽  
S. Jayaraman
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Laser Light ◽  
Isotropic Phase ◽  
Self Focusing

scholarly journals Dissipative structures induced by photoisomerization in a dye-doped nematic liquid crystal layer

2018 ◽  
Vol 376 (2135) ◽  
pp. 20170382 ◽  
Author(s):  
I. Andrade-Silva ◽  
U. Bortolozzo ◽  
C. Castillo-Pinto ◽  
M. G. Clerc ◽  
G. González-Cortés ◽  
...  
Keyword(s):  
Phase Transition ◽  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Dissipative Structures ◽  
Input Power ◽  
Isotropic Phase ◽  
Crystal Layer ◽  
Liquid Crystal Layer ◽  
Nematic Liquid Crystal Layer ◽  
Interface Propagation

Order–disorder phase transitions driven by temperature or light in soft matter materials exhibit complex dissipative structures. Here, we investigate the spatio-temporal phenomena induced by light in a dye-doped nematic liquid crystal layer. Experimentally, for planar anchoring of the nematic layer and high enough input power, photoisomerization processes induce a nematic–isotropic phase transition mediated by interface propagation between the two phases. In the case of a twisted nematic layer and for intermediate input power, the light induces a spatially modulated phase, which exhibits stripe patterns. The pattern originates as an instability mediated by interface propagation between the modulated and the homogeneous nematic states. Theoretically, the phase transition, emergence of stripe patterns and front dynamics are described on the basis of a proposed model for the dopant concentration coupled with the nematic order parameter. Numerical simulations show quite a fair agreement with the experimental observations. This article is part of the theme issue ‘Dissipative structures in matter out of equilibrium: from chemistry, photonics and biology (part 2)’.

scholarly journals Simulations and experiments on self-focusing conditions in nematic liquid-crystal planar cells

2004 ◽  
Vol 12 (6) ◽  
pp. 1011 ◽  
Author(s):  
Jeroen Beeckman ◽  
Kristiaan Neyts ◽  
Xavier Hutsebaut ◽  
Cyril Cambournac ◽  
Marc Haelterman
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Self Focusing ◽  
Planar Cells

Viscosity coefficients in the isotropic phase of a nematic liquid crystal

1977 ◽  
Vol 38 (2) ◽  
pp. 159-162 ◽  
Author(s):  
P. Martinoty ◽  
F. Kiry ◽  
S. Nagai ◽  
S. Candau ◽  
F. Debeauvais
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Isotropic Phase ◽  
Viscosity Coefficients

Induction of orientational order in the isotropic phase of a nematic liquid crystal

2001 ◽  
Vol 64 (2) ◽  
Author(s):  
M. Simões ◽  
P. R. Fernandes ◽  
A. J. Palangana ◽  
S. M. Domiciano
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Orientational Order ◽  
Isotropic Phase

Pretransitional behavior in the isotropic phase of a nematic liquid crystal with the transverse permanent dipole moment

2006 ◽  
Vol 124 (14) ◽  
pp. 144907 ◽  
Author(s):  
Malgorzata Janik ◽  
Sylwester J. Rzoska ◽  
Aleksandra Drozd-Rzoska ◽  
J. Zioło ◽  
Pawel Janik ◽  
...  
Keyword(s):  
Dipole Moment ◽  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Permanent Dipole Moment ◽  
Isotropic Phase

Laser Beam Shaping using Self-Focusing in a Nematic Liquid Crystal

2006 ◽  
Vol 454 (1) ◽  
pp. 217/[619]-224/[626] ◽  
Author(s):  
Andriy Shevchenko ◽  
Antti Hakola ◽  
Scott C. Buchter ◽  
Matti Kaivola ◽  
Nelson V. Tabiryan
Keyword(s):  
Liquid Crystal ◽  
Laser Beam ◽  
Nematic Liquid Crystal ◽  
Beam Shaping ◽  
Laser Beam Shaping ◽  
Self Focusing
Sign in / Sign up

Export Citation Format

Share Document