文献类型：期刊文献

英文题名：Mechanically responding optical sensing with topological defects induced high twisted liquid crystals

作者：Song, Chunying[1];Luo, Duanbin[2];Zheng, Zhigang[2]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Phys, Shanghai 200237, Peoples R China

年份：2026

卷号：195

外文期刊名：OPTICS AND LASER TECHNOLOGY

收录：;EI(收录号：20255219797664);WOS:【SCI-EXPANDED(收录号:WOS:001656118100001)】；

语种：英文

外文关键词：Nematic liquid crystal; Topological defect; High twisted structure; Pressure-sensitive optics; Spectral response

摘要：Topological defects in nematic liquid crystals (LCs) provide a unique platform for defect manipulation owing to their balance between stability and reconfigurability. Recent advances in LCs and their hybrid nanocomposite materials demonstrate great potential in opto-electronic applications and optical sensing due to their greater capacity to regulate optical responses to external stimuli. The molecular orientation induced by topological defects in LCs and their related optical properties provides new potential applications for microstructure modulation. In this work, topological defect line with circular patterns is prepared in nematic LCs using a dynamic photo-patterning system. Under the action of pressure, a kind of 180 degrees twisted structure in the circular pattern area can be generated through the transformation of topological defect line, leading to the appearance of structural colors. The pressure-dependent spectral measurements reveal a linear wavelength-pressure relationship, reaching a maximum sensitivity of 1.26 nm kPa-1. This stress-induced polarization filtering coloration provides a potential new approach for LCs in optical stress sensing.