Fast-switching liquid crystal diffusers: outlook on optical properties and applicability in volumetric display architecture

2021 ◽  
Author(s):  
Ainars Ozols ◽  
Edmunds Zutis ◽  
Roberts Zabels ◽  
Elza Linina ◽  
Kriss Osmanis ◽  
...  
Keyword(s):  
Optical Properties ◽  
Liquid Crystal ◽  
Fast Switching ◽  
Volumetric Display

scholarly journals Polymer Dispersed Cholesteric Liquid Crystals With a Toroidal Director Configuration under an Electric Field

Polymers ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 732
Author(s):  
Anna P. Gardymova ◽  
Mikhail N. Krakhalev ◽  
Victor Ya. Zyryanov ◽  
Alexandra A. Gruzdenko ◽  
Andrey A. Alekseev ◽  
...  
Keyword(s):  
Optical Properties ◽  
Liquid Crystal ◽  
Electric Field ◽  
Point Defects ◽  
Structural Response ◽  
Optical Filters ◽  
Response Curves ◽  
Polymer Dispersed Liquid Crystal ◽  
Dichroic Dye ◽  
Polymer Dispersed

The electro-optical properties of polymer dispersed liquid crystal (PDLC) films are highly dependent on the features of the contained liquid crystal (LC) droplets. Cholesteric LC droplets with homeotropic boundaries can form several topologically different orientational structures, including ones with single and more point defects, layer-like, and axisymmetric twisted toroidal structures. These structures are very sensitive to an applied electric field. In this work, we have demonstrated experimentally and by computer simulations that twisted toroidal droplets reveal strong structural response to the electric field. In turn, this leads to vivid changes in the optical texture in crossed polarizers. The response of droplets of different sizes were found to be equivalent in terms of dimensionless parameters. In addition, the explanation of this phenomenon showed a comparison of theoretical and experimental structural response curves aids to determine the shape of the droplet. Finally, we demonstrated that the addition of a dichroic dye allows such films to be used as optical filters with adjustable color even without polarizers.

Electronic and electro-optical properties of 5CB and 5CT liquid crystal molecules: A comparative DFT study

Pramana ◽  
2021 ◽  
Vol 95 (2) ◽  
Author(s):  
Dipendra Sharma ◽  
Gargi Tiwari ◽  
Sugriva Nath Tiwari
Keyword(s):  
Optical Properties ◽  
Liquid Crystal ◽  
Dft Study

Nonlinear optical properties of fast, photoswitchable cholesteric liquid crystal bandgaps

2011 ◽  
Vol 1 (5) ◽  
pp. 943 ◽  
Author(s):  
Uladzimir A. Hrozhyk ◽  
Svetlana V. Serak ◽  
Nelson V. Tabiryan ◽  
Timothy J. White ◽  
Timothy J. Bunning
Keyword(s):  
Optical Properties ◽  
Liquid Crystal ◽  
Nonlinear Optical ◽  
Cholesteric Liquid Crystal ◽  
Nonlinear Optical Properties

scholarly journals Holographic Polymer-Dispersed Liquid Crystals: Materials, Formation, and Applications

2008 ◽  
Vol 2008 ◽  
pp. 1-52 ◽  
Author(s):  
Y. J. Liu ◽  
X. W. Sun
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Refractive Index Profile ◽  
Single Step ◽  
Fast Switching ◽  
Polymer Dispersed Liquid Crystal ◽  
Current State ◽  
Index Matching ◽  
Polymer Dispersed ◽  
Materials Used

By combining polymer-dispersed liquid crystal (PDLC) and holography, holographic PDLC (H-PDLC) has emerged as a new composite material for switchable or tunable optical devices. Generally, H-PDLC structures are created in a liquid crystal cell filled with polymer-dispersed liquid crystal materials by recording the interference pattern generated by two or more coherent laser beams which is a fast and single-step fabrication. With a relatively ideal phase separation between liquid crystals and polymers, periodic refractive index profile is formed in the cell and thus light can be diffracted. Under a suitable electric field, the light diffraction behavior disappears due to the index matching between liquid crystals and polymers. H-PDLCs show a fast switching time due to the small size of the liquid crystal droplets. So far, H-PDLCs have been applied in many promising applications in photonics, such as flat panel displays, switchable gratings, switchable lasers, switchable microlenses, and switchable photonic crystals. In this paper, we review the current state-of-the-art of H-PDLCs including the materials used to date, the grating formation dynamics and simulations, the optimization of electro-optical properties, the photonic applications, and the issues existed in H-PDLCs.

Study of electro-optical properties of liquid crystal/reactive mesogen-coated liquid crystal display fabricated by slit coater

2014 ◽  
Vol 41 (5) ◽  
pp. 667-672 ◽  
Author(s):  
Yukihiro Nagataki ◽  
Thet Naing Oo ◽  
Takuya Yamamoto ◽  
Katsuyoshi Miyashita ◽  
Hajime Hirata ◽  
...  
Keyword(s):  
Optical Properties ◽  
Liquid Crystal ◽  
Liquid Crystal Display
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