飞秒强激光作用下线性等离子体层中光场和电子密度的自洽分布

Field structure and electron density profile in circularly polarized femtosecond laser interaction with a linear plasma

自洽求解了圆偏振的飞秒强激光作用下线性等离子体层中光场和电子密度的分布 .研究发现在激光有质动力的作用下 ,电子密度分布严重偏离离子密度分布 ,甚至出现了一系列的“电子岛”和“电子空腔” .由于电荷分离 ,等离子体内形成了很强的静电场 ,一部分激光能量转化为等离子体内的静电能 .线性等离子体层储存静电能的大小随着入射激光强度的增加而显著上升 .

The electron density profile is solved self-consistently in circularly polarized femtosecond laser vertically interacting with a linear plasma. The result shows that a set of electron islands and cavities are produced in the relativistic plasma. The laser energy is partially trapped in these cavities due to strong static electric fields caused by the separation of electrons and ions. The dependence of the trapped static electric energy on the laser intensity is also discussed.