用于可调谐随机激光的模板化球形相液晶

Templated Sphere Phase Liquid Crystals for Tunable Random Lasing.

作者信息

Chen Ziping, Hu Dechun, Chen Xingwu, Zeng Deren, Lee Yungjui, Chen Xiaoxian, Lu Jiangang

机构信息

National Engineering Lab for TFT-LCD Materials and Technologies, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.

Shenzhen China Star Optoelectronics Technology Co., Ltd., Shenzhen 518132, China.

出版信息

Nanomaterials (Basel). 2017 Nov 15;7(11):392. doi: 10.3390/nano7110392.

DOI:10.3390/nano7110392

PMID:29140283

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5707609/

Abstract

A sphere phase liquid crystal (SPLC) composed of three-dimensional twist structures with disclinations among them exists between isotropic phase and blue phase in a very narrow temperature range, about several degrees centigrade. A low concentration polymer template is applied to improve the thermal stability of SPLCs and broadens the temperature range to more than 448 K. By template processing, a wavelength tunable random lasing is demonstrated with dye doped SPLC. With different polymer concentrations, the reconstructed SPLC random lasing may achieve more than 40 nm wavelength continuous shifting by electric field modulation.

摘要

一种由三维扭曲结构组成且其中存在位错的球形相液晶（SPLC），在各向同性相和蓝相之间的非常窄的温度范围内（约几摄氏度）存在。应用低浓度聚合物模板来提高SPLC的热稳定性，并将温度范围拓宽至超过448K。通过模板处理，在染料掺杂的SPLC中展示了波长可调谐随机激光发射。对于不同的聚合物浓度，重构的SPLC随机激光发射可通过电场调制实现超过40nm的波长连续调谐。