螺旋胆甾型液晶中的非线性光学导向重新定向:简要回顾

IF 5.4 1区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY GIANT Pub Date : 2024-06-28 DOI:10.1016/j.giant.2024.100311
Liana Lucchetti , Giovanni Nava
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引用次数: 0

摘要

胆甾型液晶又称手性向列液晶,具有直角螺旋结构,间距在亚微米和微米范围内。虽然自从发现向列液晶的巨大光学非线性以来,人们就一直在考虑在这类材料中实现光学重新定向的可能性,但要在光的诱导下对螺旋结构进行明显的调制,已被证明是一项具有挑战性的任务。最近通过实验发现了一种具有斜螺旋结构的手性相,即 Meyer 和 DeGennes 于 1968 年预测的螺旋相,这为观察这种光轴的光学重新定向提供了机会。本文简要回顾了这些非常规手性向列液晶的非线性光学特性,旨在说明液晶相的世界仍然可以通过新的材料特性和新的物理学而令人惊叹。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Nonlinear optical director reorientation in heliconical cholesteric liquid crystals: a brief review

Cholesteric liquid crystals, also known as chiral nematics, possess a right-angle helicoidal structure with pitch in the submicrometer and micrometer range. Although the possibility of getting optical reorientation in this kind of materials has been considered since the discovery of giant optical nonlinearity in nematic liquid crystals, a significant light-induced modulation of the helical structure has shown to be a challenging task. The recent experimental realization of a chiral phase with an oblique helicoidal structure, identified as the heliconical phase predicted by Meyer and DeGennes in 1968, offers the opportunity to observe such an optical reorientation of the optic axis. This paper is a brief review of the nonlinear optical properties of these unconventional chiral nematic liquid crystals and is aimed at showing that the world of liquid crystalline phases can still amaze with new material properties and new physics.

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来源期刊
GIANT
GIANT Multiple-
CiteScore
8.50
自引率
8.60%
发文量
46
审稿时长
42 days
期刊介绍: Giant is an interdisciplinary title focusing on fundamental and applied macromolecular science spanning all chemistry, physics, biology, and materials aspects of the field in the broadest sense. Key areas covered include macromolecular chemistry, supramolecular assembly, multiscale and multifunctional materials, organic-inorganic hybrid materials, biophysics, biomimetics and surface science. Core topics range from developments in synthesis, characterisation and assembly towards creating uniformly sized precision macromolecules with tailored properties, to the design and assembly of nanostructured materials in multiple dimensions, and further to the study of smart or living designer materials with tuneable multiscale properties.
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