journal article·2019-04

Light Tunable Gratings Based on Flexoelectric Effect in Photoresponsive Bent‐Core Nematics

Hongzhen Jing, Mingya Xu, Ying Xiang, Everett Wang, Dongfeng Liu, Anna Poryvai, Michal Kohout, Nándor Éber, Ágnes Buka

Advanced Optical Materials· Volume 7· Issue 8
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Abstract

Abstract A new photoresponsive bent‐core nematic (BCN) material, which exhibits flexoelectric domains (FDs) driven by electric field, is reported. Unexpectedly, it is found that the morphologies of FDs can be controlled by irradiation with light fields. This light tunability is ascribed to the photoisomerization effect of the azo moiety within the BCN molecules, where the ratio of trans and cis isomers changes according to the parameters of the light field, resulting in adjustable electric threshold and periodicity of FDs. Based on this principle, a prototype of controllable optical grating is assembeled, whose operation can be manipulated by the wavelength or intensity of light. Due to the easy, instant, and remote operation by light, this optical, contactless tunability has a great advantage over traditional electric control in tunable photonic devices.
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Research context

OpenAlex topics: Liquid Crystal Research Advancements · Advanced Materials and Mechanics · Nonlinear Photonic Systems

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Information Engineering Guangdong University of Technology Guangzhou 510006 P. R. China

Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter Guangdong University of Technology Guangzhou 510006 China

Department of Organic Chemistry University of Chemistry and Technology Prague Technická 5 CZ‐16628 Prague Czech Republic

Institute for Solid State Physics and Optics Wigner Research Centre for Physics Hungarian Academy of Sciences H‐1121 Budapest, Konkoly‐Thege Miklós út 29‐33 Hungary

Funding

National Natural Science Foundation of China · Guangdong Science and Technology Department · Guangzhou Municipal Science and Technology Project · Grantová Agentura České Republiky · Nemzeti Kutatási Fejlesztési és Innovációs Hivatal

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