金属和半导体碳化物纳米颗粒激光诱导等离子体中的谐波产生

Harmonics Generation in the Laser-Induced Plasmas of Metal and Semiconductor Carbide Nanoparticles.

作者信息

Kim Vyacheslav V, Konda Srinivasa Rao, Yu Weili, Li Wei, Ganeev Rashid A

机构信息

The GPL Photonics Laboratory, State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China.

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

出版信息

Nanomaterials (Basel). 2022 Nov 28;12(23):4228. doi: 10.3390/nano12234228.

DOI:10.3390/nano12234228

PMID:36500851

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9740026/

Abstract

Carbon-containing plasma is an attractive medium for generation of harmonics of laser pulses in the extreme ultraviolet range. We ablate two metal carbide (BC and CrC) nanoparticles and silicon carbide (SiC) nanoparticles and generate harmonics after propagation of 35 fs pulses through the laser-induced plasmas. We analyze the spectra, spectral shifts, and splitting of harmonics from nanoparticles-contained plasmas, which demonstrate the chirp-related harmonic cut-off scaling. In addition, we present the simplified two-color pump model calculations of HHG based on the strong field approximation.

摘要

含碳等离子体是在极紫外波段产生激光脉冲谐波的一种有吸引力的介质。我们烧蚀两种金属碳化物（BC和CrC）纳米颗粒以及碳化硅（SiC）纳米颗粒，并在35飞秒脉冲通过激光诱导等离子体传播后产生谐波。我们分析了含纳米颗粒等离子体中谐波的光谱、光谱位移和分裂情况，这些结果证明了与啁啾相关的谐波截止标度。此外，我们基于强场近似给出了高次谐波产生的简化双色泵浦模型计算结果。