Role of resonance absorption in terahertz radiation generation from solid targets

被引：22

作者：

Li, Chun ^{[1
]}

Cui, Yun-Qian ^{[1
]}

Zhou, Mu-Lin ^{[1
]}

Du, Fei ^{[1
]}

Li, Yu-Tong ^{[1
]}

Wang, Wei-Min ^{[1
]}

Chen, Li-Ming ^{[1
]}

Sheng, Zheng-Ming ^{[1
,2
]}

Ma, Jing-Long ^{[1
]}

Lu, Xin ^{[1
]}

Zhang, Jie ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[2] Shanghai Jiao Tong Univ, Dept Phys, Shanghai 200240, Peoples R China

来源：

OPTICS EXPRESS | 2014年 / 22卷 / 10期

基金：

中国国家自然科学基金;

关键词：

HIGH-INTENSITY-LASER; X-RAY-EMISSION; FEMTOSECOND LASER; PULSES; PLASMA; AIR; RECTIFICATION; TECHNOLOGY; BEAM;

D O I：

10.1364/OE.22.011797

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The interaction of 100-fs laser pulses with solid targets at laser intensities 10(16)-10(18) W/cm(2) has been investigated experimentally by simultaneous measurements of terahertz (THz) and second harmonic signals. THz yield at the front side of the target, which rises from the self-organized transient electron currents along the target surface, is found scaling linearly with the laser intensity basically. Measurements of specularly reflected light spectrum show clear evidence of resonance absorption. The positive effects of resonance absorption on surface current and THz radiation generation have been confirmed by two-dimensional (2D) particle-in-cell (PIC) simulations and angular-dependent experiments, respectively. (C) 2014 Optical Society of America

引用

页码：11797 / 11803

页数：7

共 32 条

[1] RESONANT ABSORPTION IN A PLASMA STEP PROFILE [J].