Coherent terahertz wave emission from laser-induced plasma in isotropic transparent solid dielectrics

被引：0

作者：

Chen, Yuxuan ^{[1
]}

He, Yuhang ^{[1
]}

Dai, Chenyin ^{[1
]}

La, Xiangyu ^{[1
]}

Tian, Zhen ^{[1
]}

Dai, Jianming ^{[1
]}

机构：

[1] Tianjin Univ, Ctr Terahertz Waves, Sch Precis Instrument & Optoelect Engn, Tianjin 300072, Peoples R China

来源：

CHINESE OPTICS LETTERS | 2024年 / 22卷 / 07期

基金：

中国国家自然科学基金;

关键词：

terahertz wave emission; laser-induced plasma; laser-solid interaction; ponderomotive force; fused silica; HIGH-INTENSITY-LASER; TIME-DOMAIN SPECTROSCOPY; PULSE; RADIATION; ABLATION; GENERATION; GLASS;

D O I：

10.3788/COL202422.073701

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this Letter, we employ fused silica and two types of optical glass as examples to investigate the coherent terahertz (THz) wave emission from laser-ionized isotropic transparent dielectrics. Based on the laser energy and incident angle dependences, we ascribe the THz emission to the ponderomotive force-induced dipole oscillation. Additionally, our investigation on the dependence of THz amplitude on the laser pulse duration confirms the dominant role of avalanche ionization in solid dielectrics. The THz emission can be utilized to indirectly monitor the ultrafast dynamics of carrier generation and motion during the laser ionization process of solid dielectrics.

引用

页数：5

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