Effects of Photopatterning Conditions on Azimuthal Surface Anchoring Strength DOI Creative Commons
Nilanthi P. Haputhanthrige, Mojtaba Rajabi, Oleg D. Lavrentovich

et al.

Crystals, Journal Year: 2024, Volume and Issue: 14(12), P. 1058 - 1058

Published: Dec. 6, 2024

Spatially varying alignment of liquid crystals is essential for research and applications. One widely used method based on the photopatterning thin layers azo-dye molecules, such as Brilliant Yellow (BY), that serve an aligning substrate a crystal. In this study, we examine how conditions, BY layer thickness (b), light intensity (I), irradiation dose, age affect quality strength azimuthal surface anchoring. The anchoring coefficient, W, determined by analyzing splitting integer disclinations into half-integer at prepatterned substrates. strongest achieved b in range 5–8 nm. W increases with within same I. Aging non-irradiated coating above 15 days reduces W. Our study also demonstrates sealed photopatterned cells filled conventional nematic preserve their up to four weeks, after which time decreases. This work suggests optimization pathways photoalignment crystals.

Language: Английский

Next-generation interfaces: integrating liquid crystal technologies in augmented and virtual reality – A review DOI
Ali Zia, Sadaf Saeed, Tianlong Man

et al.

Liquid Crystals Reviews, Journal Year: 2024, Volume and Issue: 12(1), P. 30 - 56

Published: Jan. 2, 2024

Language: Английский

Citations

4
Epoxy-acrylate/nano-SiO2 hybrid formulations for optoelectronic coatings DOI

S.V. Dezhurov,

I.S. Chekulaev, R.N. Kucherov

et al.

Progress in Organic Coatings, Journal Year: 2025, Volume and Issue: 200, P. 109052 - 109052

Published: Jan. 5, 2025

Language: Английский

Citations

0
Electrical Features of Liquid Crystal Composition Doped with Cobalt Ferrite: Possible Sensing Applications DOI Creative Commons
Ya. V. Barnash, Sonja Jovanović, Zoran Jovanović

et al.

Inorganics, Journal Year: 2025, Volume and Issue: 13(4), P. 107 - 107

Published: March 28, 2025

The effects of CoFe2O4 nanoparticles on the properties an electro-optical liquid crystal cell based nematic composition 4-Cyano-4′-pentylbiphenyl (5CB) under influence different forms bias voltage were studied. Detailed results established for application sinusoidal voltages with various frequencies and amplitudes. At input signal, a frequency 500 kHz, resonant current increase was obtained in electrical circuit, followed by decrease frequency. This indicates formation consistent oscillatory circuit. quality factor nanoparticle system does not depend amplitude controlled voltage. Liquid cells constant can be used number devices technologies, including extended sensing devices, where stable are required.

Language: Английский

Citations

0
Three-layer polarisation volume grating with enhanced diffraction efficiency and FOV in AR and VR applications DOI
Ali Zia, Huan Wu, Sadaf Saeed

et al.

Liquid Crystals, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 10

Published: Nov. 4, 2024

In the rapidly evolving fields of Augmented Reality (AR) and Virtual (VR), achieving high diffraction efficiency a wide field view (FOV) is critical for enhancing visual experience. This paper presents three-layer Polarisation Volume Grating (TL-PVG) structure designed to address limitations single-layer PVGs in AR/VR applications. By stacking multiple PVG layers with different tilt angles, TL-PVG achieves an expanded angular bandwidth improved efficiency, enabling brighter more immersive displays. The proposed incorporates polarisation multiplexing optimise optical by approximately 75%, thereby image brightness sharpness. experimental results demonstrate that significantly outperforms traditional PVGs, offering promising solution waveguide elements next-generation study provides comprehensive analysis fabrication process, properties, applications TL-PVGs, highlighting their potential revolutionise technology.

Language: Английский

Citations

1
Metal-Free Synthesis, Single Crystal Analysis and Photophysical Behavior of p-Terphenyls DOI

Sathish Kumar J,

Fateh V. Singh

Journal of Molecular Structure, Journal Year: 2024, Volume and Issue: 1322, P. 140608 - 140608

Published: Nov. 9, 2024

Language: Английский

Citations

1
Peculiarities of polarised light scattering in nematic liquid crystals with large-scale director perturbations DOI
M. V. Vasnetsov, V. V. Ponevchinsky,

Valeriy Voitsekhovych

et al.

Liquid Crystals, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 7

Published: Aug. 12, 2024

We examine light scattering in a birefringent material, namely uniaxial nematic liquid crystal possessing macroscopic orientation perturbations (variations of director planar alignment). Our theoretical analysis and direct experiments proved that the polarisation state scattered speckle-field is uniform elliptical (in common case). The ellipse azimuth waves mirror reflected to one directly transmitted relative optical axis.

Language: Английский

Citations

0
Electrically Tunable Liquid Crystal Lens with Varifocal Capability DOI

Zhuxuan Wei,

Mengqi He,

Shixiao Li

et al.

ACS Applied Optical Materials, Journal Year: 2024, Volume and Issue: 2(10), P. 2175 - 2183

Published: Oct. 10, 2024

This article presents the design, fabrication, characterization, and performance evaluation of a varifocal liquid crystal (LC) lens with an inhomogeneous cell gap. The prototype employs LC compound high birefringence features optimized multilayered glass-electrode-LC configuration device's thickness under 1 mm, demonstrating remarkable power tunability range −0.44 to −2.84 diopter (D) low voltage operation. Also, we introduce wireless powering method enhance mobility durability device. ultrathin smart design eliminates need for mechanical actuation complex control systems, offering significant potential applications in next generation solution optical devices such as detachable lenses, contact augmented reality systems.

Language: Английский

Citations

0
Effects of Photopatterning Conditions on Azimuthal Surface Anchoring Strength DOI Creative Commons
Nilanthi P. Haputhanthrige, Mojtaba Rajabi, Oleg D. Lavrentovich

et al.

Crystals, Journal Year: 2024, Volume and Issue: 14(12), P. 1058 - 1058

Published: Dec. 6, 2024

Spatially varying alignment of liquid crystals is essential for research and applications. One widely used method based on the photopatterning thin layers azo-dye molecules, such as Brilliant Yellow (BY), that serve an aligning substrate a crystal. In this study, we examine how conditions, BY layer thickness (b), light intensity (I), irradiation dose, age affect quality strength azimuthal surface anchoring. The anchoring coefficient, W, determined by analyzing splitting integer disclinations into half-integer at prepatterned substrates. strongest achieved b in range 5–8 nm. W increases with within same I. Aging non-irradiated coating above 15 days reduces W. Our study also demonstrates sealed photopatterned cells filled conventional nematic preserve their up to four weeks, after which time decreases. This work suggests optimization pathways photoalignment crystals.

Language: Английский

Citations

0