@Article{CiCP-4-1258,
author = {Zheng-Ming Sheng, Hui-Chun Wu, Wei-Min Wang, Min Chen, Xiao-Gang Dong, Jun Zheng and Jie Zhang},
title = {Simulation of High Power THz Emission from Laser Interaction with Tenuous Plasma and Gas Targets},
journal = {Communications in Computational Physics},
year = {2008},
volume = {4},
number = {5},
pages = {1258--1278},
abstract = {<p style="text-align: justify;">With one- and two-dimensional particle-in-cell (PIC) codes, we simulate the
generation of high power terahertz (THz) emission from the interaction of ultrashort
intense lasers with tenuous plasma and gas targets. By driving high-amplitude electron plasma waves either with a laser wakefield or the beatwave of two laser pulses,
powerful THz electromagnetic pulses can be produced by linear mode conversion in
inhomogeneous plasma or by the transient current induced at the surfaces of a thin
plasma layer of few plasma wavelengths. Even with incident lasers at moderate intensity such as 10<sup>17</sup>W/cm<sup>2</sup>, the produced emission can be at the level of tens of MW
in power and capable of affording field strengths of a few MV/cm, suitable for the
studies of THz nonlinear physics. With field ionization included in the PIC codes, THz
emission from laser interaction with tenuous gas targets is simulated. It is found that
the transient transverse current formed during the ionization processes is responsible
for the THz emission. With this mechanism, one may also obtain THz fields of MV/cm
at lower laser intensity as compared with the schemes of plasma-wave excitation.</p>},
issn = {1991-7120},
doi = {https://doi.org/},
url = {http://global-sci.org/intro/article_detail/cicp/7837.html}
}