摘要
本文报道10μm半径数量级单个激光斑在预形成等离子体中造成的侧向3ω_0/2谐波时空分辨特性。详细讨论了该数量级激光斑小尺度自聚成丝与3ω_0/2谐波辐射的紧密关联性。提出在低到0.05n_c低密度等离子体区域出现的侧向谐波信号可能由自聚引发的Langmuir波或离子声波散射构成。
We present in this paper the temporally and spatially resolved feature of the side scattered 3ω_o/2 harmonic emission, induced by A single laser spot with ten-micron-radius-scale in a preformed laser plasma. The close relation of the harmonic emission with such a small scale laser self-focusing filamentation has been discussed in detail. It is suggested that the side scattered harmonic signal from a underdense region as low as 0.05nc may be caused by the Lang-muir wave and/or ion-acoustic wave scattering induced by laser dynamic filamentation.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
1991年第2期234-242,共9页
Acta Physica Sinica
基金
国家自然科学基金
