scholarly journals Three-dimensional crystal orientation of blue phase liquid crystals on surfaces

2018 ◽  
Author(s):  
Misaki Takahashi ◽  
Takuma Ohkawa ◽  
Masanori Ozaki ◽  
Hiroyuki Yoshida ◽  
Hirotsugu Kikuchi ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Crystal Orientation ◽  
Three Dimensional ◽  
Phase Liquid ◽  
Blue Phase ◽  
Dimensional Crystal

scholarly journals Blue Phase Liquid Crystals with Tailored Crystal Orientation for Photonic Applications

Symmetry ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1584
Author(s):  
SeongYong Cho ◽  
Masanori Ozaki
Keyword(s):  
Liquid Crystals ◽  
Photonic Crystals ◽  
Self Assembly ◽  
Crystal Orientation ◽  
Three Dimensional ◽  
Optical Characteristics ◽  
Crystal Plane ◽  
Potential Applications ◽  
Blue Phase ◽  
Control Light

Blue phase (BP) liquid crystals, which self-assemble into soft three-dimensional (3D) photonic crystals, have attracted enormous research interest due to their ability to control light and potential photonic applications. BPs have long been known as optically isotropic materials, but recent works have revealed that achieving on-demand 3D orientation of BP crystals is necessary to obtain improved electro-optical performance and tailored optical characteristics. Various approaches have been proposed to precisely manipulate the crystal orientation of BPs on a substrate, through the assistance of external stimuli and directing self-assembly processes. Here, we discuss the various orientation-controlling technologies of BP crystals, with their mechanisms, advantages, drawbacks, and promising applications. This review first focuses on technologies to achieve the uniform crystal plane orientation of BPs on a substrate. Further, we review a strategy to control the azimuthal orientation of BPs along predesigned directions with a uniform crystal plane, allowing the 3D orientation to be uniquely defined on a substrate. The potential applications such as volume holograms are also discussed with their operation principle. This review provides significant advances in 3D photonic crystals and gives a huge potential for intelligent photonic devices with tailored optical characteristics.

scholarly journals Diffusionless transformation of soft cubic superstructure from amorphous to simple cubic and body-centered cubic phases

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Jie Liu ◽  
Wenzhe Liu ◽  
Bo Guan ◽  
Bo Wang ◽  
Lei Shi ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
X Ray Diffraction ◽  
Photonic Materials ◽  
Simple Cubic ◽  
Cubic Phases ◽  
Transmission Electron ◽  
Phase Liquid ◽  
Blue Phase ◽  
Blue Phases ◽  
Temperature Window

AbstractIn a narrow temperature window in going from the isotropic to highly chiral orders, cholesteric liquid crystals exhibit so-called blue phases, consisting of different morphologies of long, space-filling double twisted cylinders. Those of cubic spatial symmetry have attracted considerable attention in recent years as templates for soft photonic materials. The latter often requires the creation of monodomains of predefined orientation and size, but their engineering is complicated by a lack of comprehensive understanding of how blue phases nucleate and transform into each other at a submicrometer length scale. In this work, we accomplish this by intercepting nucleation processes at intermediate stages with fast cross-linking of a stabilizing polymer matrix. We reveal using transmission electron microscopy, synchrotron small-angle X-ray diffraction, and angle-resolved microspectroscopy that the grid of double-twisted cylinders undergoes highly coordinated, diffusionless transformations. In light of our findings, the implementation of several applications is discussed, such as temperature-switchable QR codes, micro-area lasing, and fabrication of blue phase liquid crystals with large domain sizes.

Mesophase properties of fluorene-core mesogens and their effects on blue phase liquid crystals

2021 ◽  
pp. 1-11
Author(s):  
Ying Shi ◽  
WanLi He ◽  
YaQian Zhang ◽  
YongFeng Cui ◽  
Lei Zhang ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Phase Liquid ◽  
Blue Phase

Field-induced lattice transformation of blue-phase liquid crystals

2021 ◽  
Author(s):  
Iam-Choon Khoo ◽  
Chun-Wei Chen ◽  
Tsung-Hsien Lin
Keyword(s):  
Liquid Crystals ◽  
Phase Liquid ◽  
Blue Phase

Ultra-fast switching blue phase liquid crystals diffraction grating stabilized by chiral monomer

2018 ◽  
Vol 51 (18) ◽  
pp. 185103 ◽  
Author(s):  
Ramesh Manda ◽  
Srinivas Pagidi ◽  
Surjya Sarathi Bhattacharya ◽  
Hyesun Yoo ◽  
Arun Kumar T ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Diffraction Grating ◽  
Fast Switching ◽  
Phase Liquid ◽  
Blue Phase

Blue Phase Liquid Crystals and Its Application in Microlens

2012 ◽  
Vol 27 (6) ◽  
pp. 752-758
Author(s):  
李青 LI Qing ◽  
严静 YAN Jing ◽  
崔勇扬 CUI Yong-yang
Keyword(s):  
Liquid Crystals ◽  
Phase Liquid ◽  
Blue Phase

Symmetric Continuously Tunable Photonic Band Gaps in Blue-Phase Liquid Crystals Switched by an Alternating Current Field

2019 ◽  
Vol 11 (24) ◽  
pp. 22015-22020 ◽  
Author(s):  
Xiao-Wei Du ◽  
De-Shan Hou ◽  
Xuan Li ◽  
Dong-Peng Sun ◽  
Jiong-Fang Lan ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Alternating Current ◽  
Band Gaps ◽  
Photonic Band Gaps ◽  
Current Field ◽  
Phase Liquid ◽  
Blue Phase ◽  
Photonic Band
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