scholarly journals Optical polarization grating induced liquid crystal micro-structure using azo-dye command layer

2006 ◽  
Vol 14 (22) ◽  
pp. 10558 ◽  
Author(s):  
Vladimir Presnyakov ◽  
Karen Asatryan ◽  
Tigran Galstian ◽  
Vladimir Chigrinov
Keyword(s):  
Liquid Crystal ◽  
Azo Dye ◽  
Optical Polarization ◽  
Micro Structure ◽  
Polarization Grating

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.

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

Fabrication and Characterizes of TiO2 Nanomaterials Templated by Lyotropic Liquid Crystal

2011 ◽  
Vol 399-401 ◽  
pp. 532-537
Author(s):  
Li Hua Liu ◽  
Ying Bai ◽  
Fu Min Wang ◽  
Ning Liu
Keyword(s):  
Aqueous Solution ◽  
Liquid Crystal ◽  
Liquid Crystals ◽  
Nonionic Surfactant ◽  
Formation Mechanism ◽  
Lyotropic Liquid Crystals ◽  
Lyotropic Liquid Crystal ◽  
Micro Structure ◽  
Ft Ir ◽  
Rod Structures

TiO2 nanomaterials were synthesized in lyotropic liquid crystal formed by nonionic surfactant TritonX-100 and TiOSO4 aqueous solution with NH3•H2O as precipitator. The lyotropic liquid crystals were characterized by means of POM and Low-angle XRD. FT-IR, TGA, XRD, TEM were used to characterize the TiO2 samples. It was found that all the lytropic liquid crystal were in lamellar liquid crysal phase and after casting the micro-structure of the LLC phase, the TiO2 samples were self-assemble to form lamellar, sphere and rod structures. According to the characterization results, possible formation mechanism was proposed.

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

scholarly journals Tunable two-dimensional polarization grating using a self-organized micropixelated liquid crystal structure

RSC Advances ◽  
2018 ◽  
Vol 8 (72) ◽  
pp. 41472-41479 ◽  
Author(s):  
Reo Amano ◽  
Péter Salamon ◽  
Shunsuke Yokokawa ◽  
Fumiaki Kobayashi ◽  
Yuji Sasaki ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Topological Defects ◽  
Self Organization ◽  
Two Dimensional ◽  
Self Organized ◽  
Optical Grating ◽  
Liquid Crystal Structure ◽  
Polarization Grating

A micro-pixelated pattern of a nematic liquid crystal formed by self-organization of topological defects is shown to work as a tunable two-dimensional optical grating.

scholarly journals Spatially Broadband Coupled-Surface Plasmon Wave Assisted Transmission Effect in Azo-Dye-Doped Liquid Crystal Cell

Nanomaterials ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 1357
Author(s):  
Guan-Ting Dong ◽  
Chun-Ta Wang ◽  
Yu-Ju Hung
Keyword(s):  
Liquid Crystal ◽  
Surface Plasmon ◽  
Azo Dye ◽  
Surface Plasmon Polariton ◽  
Mie Scattering ◽  
Aluminum Film ◽  
Liquid Crystal Cell ◽  
Metallic Surface ◽  
Crystal Cell ◽  
Plasmon Polariton

Active tuning on a plasmonic structure is discussed in this report. We examined the transient transmission effects of an azo-dye-doped liquid crystal cell on a metallic surface grating. The transition between isotropic and nematic phases in liquid crystal generated micro-domains was shown to induce the dynamic scattering of light from a He-Ne laser, thereby allowing transmission through a non-transparent aluminum film overlaying a dielectric grating. Various grating pitches were tested in terms of transmission effects. The patterned gratings include stripe ones and circular forms. Our results indicate that surface plasmon polariton waves are involved in the transmission process. We also demonstrated how momentum diagrams of gratings and Surface Plasmon Polariton (SPP) modes combined with Mie scattering effects could explain the broadband coupling phenomenon. This noteworthy transition process could be applied to the development of spatially broadband surface plasmon polariton coupling devices.

Two-dimensional holographic polarization grating formed on azo-dye-doped PVA films

2009 ◽  
Author(s):  
Andy Ying-Guey Fuh ◽  
Wei Yen Wu ◽  
Ming Shian Li ◽  
Hui Chi Lin
Keyword(s):  
Azo Dye ◽  
Two Dimensional ◽  
Polarization Grating
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