Photocontrol of In-plane Alignment of a Nematic Liquid Crystal by a Photochromic Spiropyran Monolayer Absorbing Linearly Polarized Light

1992 ◽  
Vol 21 (6) ◽  
pp. 1063-1066 ◽  
Author(s):  
Kunihiro Ichimura ◽  
Yuko Hayashi ◽  
Norio Ishizuki
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Polarized Light ◽  
Linearly Polarized

Generation of nematic liquid crystal alignment with polyimides exposed to linearly polarized light of long wavelength

1998 ◽  
Vol 84 (1) ◽  
pp. 181-188 ◽  
Author(s):  
Yinghan Wang ◽  
Chunying Xu ◽  
Akihiko Kanazawa ◽  
Takeshi Shiono ◽  
Tomiki Ikeda ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Polarized Light ◽  
Long Wavelength ◽  
Liquid Crystal Alignment ◽  
Linearly Polarized ◽  
Crystal Alignment

ON THE BEHAVIOR OF POLARIZED LIGHT IN TWIST-ORIENTED NEMATIC LIQUID CRYSTALS WITH ANISOTROPIC ABSORBENT DYE

2020 ◽  
Vol 54 (1 (251)) ◽  
pp. 56-60
Author(s):  
H.H. Hovakimyan
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Nematic Liquid Crystal ◽  
Azimuthal Angle ◽  
Polarized Light ◽  
Transmitted Light ◽  
Propagation Of Light ◽  
Linearly Polarized ◽  
Incoming Light

In this work we study the propagation of light in a twist-oriented pleochroic nematic liquid crystal with pleochroic dye. The dependence of the intensity of transmitted light on the azimuthal angle of the linearly polarized incoming light has been investigated experimentally. As a result, the role of absorption anisotropy has been identified.

scholarly journals Геометрическая оптика твист-ориентированного нематического жидкого кристалла с анизотропным поглощением

2019 ◽  
Vol 127 (11) ◽  
pp. 787
Author(s):  
А.О. Овакимян ◽  
А.Э. Айвазян ◽  
Л.С. Асланян
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Anisotropic Medium ◽  
Light Propagation ◽  
Light Wave ◽  
Spatial Dynamics ◽  
Polarized Light ◽  
Asymmetric Effect ◽  
Electric Component ◽  
Linearly Polarized

The spatial dynamics of polarized light in a smoothly inhomogeneous anisotropic medium mixed with an anisotropic absorbing dye is analyzed. As such a medium, a twist-oriented nematic liquid crystal with a pleochroic dye was considered. In the geometrical-optical approximation, a system of coupled shortened equations for the Cartesian components of the electric component of the light wave is obtained. A system of coupled complex equations was analytically solved and the behavior of a linearly polarized wave in such a medium was analyzed in the case of both absorption and amplification. An asymmetric effect of these two processes on the spatial dynamics of light propagation in the medium is found.

Thermal stability of alignment of a nematic liquid crystal induced by polyimides exposed to linearly polarized light

2001 ◽  
Vol 28 (3) ◽  
pp. 473-475 ◽  
Author(s):  
Yinghan Wang ◽  
Chunying Xu ◽  
Akihiko Kanazawa ◽  
Takeshi Shiono ◽  
Tomiki Ikeda ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Polarized Light ◽  
Linearly Polarized ◽  
Thermal Stability Of

Homogeneous alignment of nematic liquid crystal induced by polyimide exposed to linearly polarized light

1998 ◽  
Vol 72 (5) ◽  
pp. 545-547 ◽  
Author(s):  
Yinghan Wang ◽  
Akihiko Kanazawa ◽  
Takeshi Shiono ◽  
Tomiki Ikeda ◽  
Yasuo Matsuki ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Polarized Light ◽  
Linearly Polarized

Bragg Reflection of Linearly Polarized Light in a Chiral Smectic C Liquid Crystal for Oblique Incidence

1984 ◽  
Vol 102 (6-7) ◽  
pp. 187-192 ◽  
Author(s):  
S. N. Aronishidze ◽  
G. S. Chilaya ◽  
M. N. Kushnirenko ◽  
S. M. Osadchii
Keyword(s):  
Liquid Crystal ◽  
Oblique Incidence ◽  
Bragg Reflection ◽  
Polarized Light ◽  
Smectic C ◽  
Linearly Polarized

Bistable Characteristics of Liquid Crystal Devices with Patterned Alignment Films

2011 ◽  
Vol 264-265 ◽  
pp. 1752-1757 ◽  
Author(s):  
Jais Bin Lias ◽  
Munehiro Kimura ◽  
Tadashi Akahane
Keyword(s):  
Liquid Crystal ◽  
Uv Light ◽  
Polarized Light ◽  
Mechanical Damage ◽  
Single Step ◽  
Patterned Substrate ◽  
Electrostatic Charges ◽  
Linearly Polarized ◽  
Polyimide Coating ◽  
Homeotropic Alignment

The photoalignment technology for the alignment of liquid crystal molecules has lately gathered much attention because its advantages over the conventional rubbing of polyimide coating and several different approaches for the realization of photoalignment have been presented. Due to its non-contact nature, a photoalignment eliminates generation of dust and electrostatic charges as well as mechanical damage to the surface. Up to now, the study of the photoalignment effect has been focused mostly on uniform substrates through linearly polarized light. With the aim to achieve such a bistable liquid crystal device by means of unpolarized UV light, we have proposed a single-step laser patterning on a photoalignment layer using a photomask to achieve an equilibrium configuration of LC molecules in contact with a periodically patterned substrate. The patterns were formed by stripes of alternating random planar and homeotropic anchoring in a sub-micron scale on the order of 0.5 micron. We proposed two possible configurations of bistable LC cells that can be obtained by combination of micro-patterned surface formed with alternating random planar alignment with either planar alignment or homeotropic alignment surfaces. In this study, we have investigated the alignment properties and switching behaviours of both proposed models.

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