硫化汞量子点中非线性光学过程的研究

Investigation of Nonlinear Optical Processes in Mercury Sulfide Quantum Dots.

作者信息

Kim Vyacheslav V, Shuklov Ivan A, Mardini Alaa A, Bundulis Arturs, Zvyagin Andrey I, Kholany Rawda, Lizunova Anna A, Grube Jurgis, Sarakovskis Anatolijs, Ovchinnikov Oleg V, Ganeev Rashid A

机构信息

Laboratory of Nonlinear Optics, University of Latvia, Jelgavas 3, LV-1004 Riga, Latvia.

Moscow Institute of Physics and Technology, National Research University, 141701 Dolgoprudny, Russia.

出版信息

Nanomaterials (Basel). 2022 Apr 8;12(8):1264. doi: 10.3390/nano12081264.

DOI:10.3390/nano12081264

PMID:35457972

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9029708/

Abstract

The authors report the third-harmonic generation, nonlinear refraction, and nonlinear absorption in HgS quantum dot (QD) suspensions and films using the nanosecond and femtosecond pulses. High conversion efficiency (7 × 10) towards the third harmonic (TH) of the 900-1700 nm, 150 fs laser in the thin (70 nm) films containing HgS QDs deposited on the glass substrates is obtained. The authors analyze spectral dependencies of the TH, nonlinear refractive indices, and nonlinear absorption coefficients of QDs in the 500-1700 nm range and discuss the relation between the TH process and the low-order nonlinear optical properties of these quantum dots.

摘要

作者报告了使用纳秒和飞秒脉冲在硫化汞量子点（QD）悬浮液和薄膜中的三次谐波产生、非线性折射和非线性吸收。在沉积于玻璃基板上的含硫化汞量子点的薄（70纳米）膜中，对于900 - 1700纳米、150飞秒激光的三次谐波（TH）获得了高转换效率（7×10）。作者分析了500 - 1700纳米范围内量子点的三次谐波、非线性折射率和非线性吸收系数的光谱依赖性，并讨论了三次谐波过程与这些量子点的低阶非线性光学性质之间的关系。