Kinetics of photoinduced phase retardation in azo dye layer

Chigrinov, Vladimir G.; Kudreyko, Aleksey; Kozenkov, Vladimir M.

doi:10.1080/02678292.2022.2037766

Cited by 2 publications

(2 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The photo-induced isomerization of an azobenzene unit is well known to cause a remarkable change in the physical properties of liquid crystals. Azobenzene derivatives are expected to be useful for applications in photomemory [72,73], photoalignment [74][75][76][77][78][79], or photomobile [80,81]. A lot of research on photoinduced chirality modulation has been reported.…”

Section: External-field-induced Mirror Symmetry Breaking In Liquid Cr...mentioning

confidence: 99%

The Formation of Supramolecular Chiral Materials from Achiral Molecules Using a Liquid-Crystallin System: Symmetry Breaking, Amplification, and Transfer

Yoshizawa

2024

Crystals

View full text Add to dashboard Cite

Recently, the formation of chiral materials by the self-organization of achiral small molecules has attracted much attention. How can we obtain chirality without a chiral source? Interesting approaches, such as mechanical rotation, circularly polarized light, and asymmetric reaction fields, have been used. We describe recent research developments in supramolecular chirality in liquid crystals, focusing primarily on our group’s experimental results. We present the following concepts in this review. Spontaneous mirror symmetry breaking in self-assembled achiral trimers induces supramolecular chirality in the soft crystalline phase. Two kinds of domains with opposite handedness exist in non-equal populations. The dominant domain is amplified to produce a homochiral state. Chirality is transferred to a polymer film during the polymerization of achiral monomers by using the homochiral state as a template. Finally, we discuss how the concepts obtained from this liquid crystal research relate to the origin of homochirality in life.

show abstract

Section: External-field-induced Mirror Symmetry Breaking In Liquid Cr...mentioning

confidence: 99%

The Formation of Supramolecular Chiral Materials from Achiral Molecules Using a Liquid-Crystallin System: Symmetry Breaking, Amplification, and Transfer

Yoshizawa

2024

Crystals

View full text Add to dashboard Cite

show abstract

“…In this context, the photosensitive liquid crystalline structures represent a medium in which self-regulation of light occurs due to LC alignment by using a thin film azo dye layer. The mechanism behind photoalignment is the formation of an equilibrium statistical distribution of potential energy over rotational degrees of freedom of uniaxial azo dye molecules, and it is described by the equation of rotational diffusion [19,20].…”

Section: Introductionmentioning

confidence: 99%

Photoaligned Liquid Crystalline Structures for Photonic Applications

et al. 2023

Self Cite

View full text Add to dashboard Cite

With the advancement of information display technologies, research on liquid crystals is undergoing a tremendous shift to photonic devices. For example, devices and configurations based on liquid crystal materials are being developed for various applications, such as spectroscopy, imaging, and fiber optics. One of the problems behind the development of photonic devices lies in the preparation of patterned surfaces that can provide high resolution. Among all liquid crystal alignment techniques, photoalignment represents a promising non-contact method for the fabrication of patterned surfaces. In this review, we discuss the original research findings on electro-optic effects, which were mainly achieved at the Department of Electronic and Computer Engineering of the Hong Kong University of Science and Technology and the collaborating research laboratories.

show abstract

Kinetics of photoinduced phase retardation in azo dye layer

Cited by 2 publications

References 18 publications

The Formation of Supramolecular Chiral Materials from Achiral Molecules Using a Liquid-Crystallin System: Symmetry Breaking, Amplification, and Transfer

The Formation of Supramolecular Chiral Materials from Achiral Molecules Using a Liquid-Crystallin System: Symmetry Breaking, Amplification, and Transfer

Photoaligned Liquid Crystalline Structures for Photonic Applications

Contact Info

Product

Resources

About