Three-dimensional lattice deformation of blue phase liquid crystals under electrostriction

Zhang, Yuxian; Yoshida, Hiroyuki; Chu, Fan; Guo, Yuqiang; Yang, Zhou; Ozaki, Masanori; Wang, Qiong-Hua

doi:10.1039/d2sm00244b

Cited by 14 publications

(11 citation statements)

References 38 publications

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“…It is well known that a moderate electric field strength induces a modulated helical pitch in chiral LCs, leading to a tunable Bragg reflection of the planar‐oriented LC superstructures [81b] . For BPs that are self‐assembled with a three‐dimensional chirality, the effect of electric field leads to a lattice deformation in three dimensions, [82] which depends both on the dielectric anisotropy and the lattice orientation. By programming the photoalignment regions, periodic micropatterns were obtained by alternating highly‐ordered and randomly oriented BP crystals (Figure 7b).…”

Section: Multiple Optical Manipulationsmentioning

confidence: 99%

Multiple degrees‐of‐freedom programmable soft‐matter‐photonics: Configuration, manipulation, and advanced applications

Zhang,

Zheng,

2024

Responsive Materials

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For centuries, humans have never stopped exploring the nature of light and manipulating it, since light carries multiple information through its intrinsic wave‐particle dualism, including wavelength, amplitude, phase, polarization, spin/orbital angular momentum, etc., which determines the physical language and basic manners we perceive the objective world. Conventional optical devices, such as lenses, prisms, and lasers, are composed of solid elements that are bulky, making it difficult to manipulate light dynamically with multiple degrees‐of‐freedom. Comparatively, some responsive soft matters, especially represented by liquid crystals (LCs), possess distinctive orientational order and spontaneous self‐assembled superstructures, enabling the digital programming of microstructures and multiple degrees‐of‐freedom manipulation of their optical characteristics. The optical manipulation based on these soft superstructures, that is, the “soft‐matter‐photonics”, is playing an impressive role in integrated functional devices, especially in the present age of information explosion. Herein, we review the latest advances, respectively, in the microstructure configurations, multiple degrees‐of‐freedom manipulations, and the relevant prospective applications. Additionally, scientific issues and technical challenges that hinder the programing operation and optical manipulations are discussed. Toward a four‐dimensional optical manipulation of soft condensed matter, this review may have wide implications on a variety of applications, including the integrated fabrication of compact elements, multi‐channel information processing and high‐capacity optical communications.

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Section: Multiple Optical Manipulationsmentioning

confidence: 99%

Multiple degrees‐of‐freedom programmable soft‐matter‐photonics: Configuration, manipulation, and advanced applications

Zhang,

Zheng,

2024

Responsive Materials

Self Cite

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“…We also point out that most theoretical and experimental studies of the static electro-and magnetostriction correspond to the thermodynamical equilibrium limit. Experimental studies of electrostriction have also revealed interesting phenomena, such as the giant electrostriction [15][16][17][18][19][20][21][22][23][24][25], negative electrostriction [26,27], and deformations of liquid crystals [28,29] and biological cells [30]. On the theoretical side, electrostriction has also been under extensive study [31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48].…”

Section: Introductionmentioning

confidence: 99%

Time-dependent theory of optical electro- and magnetostriction

et al. 2023

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“…Remarkably, electric fields have diverse effects on BPs, such as Kerr effect, [41] electrostriction of lattice, or field-induced phase transition. [42,43] These can be used to induce changes in the lattice parameters thereby changing the spectral position or bandwidth of the PBGs. Besides, electrically induced reflection broadening or tuning has been observed in PSBPs, which contributed to the movement of the polymer network in the cubic lattice.…”

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confidence: 99%

Reversible Electrochromic Pattern in 3D Photonic Crystals Film from Thiol‐Acrylate‐Based Polymer‐Stabilized Blue Phase Liquid Crystals

Wang

et al. 2023

Advanced Optical Materials

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mechanical force, and chemical or electrochemical reactions, have attracted much attention in the fields of optoelectronic devices, sensors, anticounterfeiting, displays, and labeling technology. [1][2][3] Among various organic and inorganic materials, chiral liquid crystal-based soft materials have become promising candidates for creating novel photonic crystals with improved stimuli-responsive performance due to their distinctive features of selfassembly, softness, and multiple responsiveness under various stimulus. [4][5][6] Chiral liquid crystalline materials possess self-organized periodic superstructures and selective reflection of circularly polarized light determined by the chiral dopants, thus exhibiting photonic bandgaps (PBGs) with circular dichroism. [7] For 1D PCs, the cholesteric liquid crystals exhibit 1D photonic superstructures and have achieved remarkable research results in dynamic actuation by light, [8][9][10][11][12][13] temperature, [14,15] pH, [16] stretching, [17] or electric. [18,19] Blue phase liquid crystals (BPLCs) with 3D PBG that can control or manipulate the flow of visible light have recently drawn vast and increasing attention. [20] Because of the spontaneous organization inherent of their 3D periodic structures, the fabrication procedures of BPLCs may be easily implemented to achieve high-quality 3D PCs. [21] Thus, it is attractive to the development of 3D photonic nanostructures Endowing advanced 3D photonic nanoarchitectures with dynamic controllability is currently in the spotlight of soft-matter photonics research. Herein, a well-defined photopatterned polymer-stabilized blue phase (PSBP) film with 3D electrically tunable photonic bandgap is fabricated by a liquid crystalline thiol-acrylate monomers system. Remarkably, the addition of thiol monomers can effectively improve the electrical tuning performance of the PSBP film and maintain excellent thermal stability simultaneously. The proportions of acrylate and thiol monomers are proved to be a key factor on the morphology structure of the polymer network in the PSBP system. By masked UV photopolymerization, a patterned sample with a high-quality image and reversible nonsynergistic electrochromism is obtained. With increasing electric field, the patterned region changes from initial green reflection color to a red one, while no obvious visual color change occurs for the shading region with initial blue reflection color. The distinct electrically responsive behaviors are mainly caused by the microstructural difference of polymer networks, which is engendered by the migration of polymerizable monomers during polymerization. The research disclosed herein may provide new insights into the development of patterned 3D self-assembled liquid crystalline photonic crystal toward anticounterfeiting, displays, colorimetric sensors, labeling technology, and programming photonics.

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Three-dimensional lattice deformation of blue phase liquid crystals under electrostriction

Abstract: Determination of three-dimensional BP lattice constants using in situ measurements.

Cited by 14 publications

References 38 publications

Multiple degrees‐of‐freedom programmable soft‐matter‐photonics: Configuration, manipulation, and advanced applications

Multiple degrees‐of‐freedom programmable soft‐matter‐photonics: Configuration, manipulation, and advanced applications

Time-dependent theory of optical electro- and magnetostriction

Reversible Electrochromic Pattern in 3D Photonic Crystals Film from Thiol‐Acrylate‐Based Polymer‐Stabilized Blue Phase Liquid Crystals

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