紫外线照射和氧化锌纳米颗粒对特定光致变色聚合物非线性光学响应的影响

Effect of UV-Irradiation and ZnO Nanoparticles on Nonlinear Optical Response of Specific Photochromic Polymers.

作者信息

Waszkowska Karolina, Chtouki Tarek, Krupka Oksana, Smokal Vitaliy, Figà Viviana, Sahraoui Bouchta

机构信息

Laboratory MOLTECH-Anjou, University of Angers, CNRS UMR 6200, 2 Bd Lavoisier, 49045 Angers CEDEX, France.

Materials and Subatomic Physics Laboratory, Superior School of Technology, Ibn-Tofail University, Kenitra 14000, Morocco.

出版信息

Nanomaterials (Basel). 2021 Feb 16;11(2):492. doi: 10.3390/nano11020492.

DOI:10.3390/nano11020492

PMID:33669263

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7920031/

Abstract

A series of methacrylic styrylquinoline polymers have been synthesized and characterized by spectroscopic and nonlinear optical (NLO) investigations. The NLO properties of studied polymer compounds in the form of thin films prepared by a spin coating method have been investigated by means of second and third harmonic generation via Maker fringe setup with a laser source at 1064 nm and a pulse duration of 30 ps. The results show strong second harmonic signal dependence on polarization configurations. This second harmonic generation (SHG) response was enhanced by UV-irradiation at 366 nm and doping by ZnO nanoparticles (NPs) (100 nm), while the opposite effect was achieved for a third harmonic generation experiment. Thus, values of second and third order nonlinear susceptibilities were determined by theoretical calculations based on comparative models. The remarkable NLO results presented in this paper expose potential optoelectronic and photonic applications.

摘要

通过光谱和非线性光学（NLO）研究，合成并表征了一系列甲基丙烯酸苯乙烯基喹啉聚合物。通过旋涂法制备了薄膜形式的所研究聚合物化合物，并利用Maker条纹装置，在1064nm激光源和30ps脉冲持续时间下，通过二次和三次谐波产生对其NLO性质进行了研究。结果表明，二次谐波信号强烈依赖于偏振配置。通过366nm紫外线照射和掺杂100nm的ZnO纳米颗粒（NPs），二次谐波产生（SHG）响应得到增强，而在三次谐波产生实验中则得到相反的效果。因此，基于比较模型通过理论计算确定了二阶和三阶非线性极化率的值。本文所呈现的显著NLO结果揭示了潜在的光电和光子应用。