Open AccessRole of resonance absorption in terahertz radiation generation from solid targets
Author(s) -
Chun Li,
Yun-Qian Cui,
Mu-Lin Zhou,
Fei Du,
Yutong Li,
Weimin Wang,
Liming Chen,
Zheng-Ming Sheng,
Jing Ma,
Xingqiang Lü,
Jie Zhang
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.011797
Subject(s) - terahertz radiation , optics , laser , absorption (acoustics) , resonance (particle physics) , materials science , radiation , terahertz spectroscopy and technology , atomic physics , physics
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.