摘要
利用一维粒子模拟程序 ,观测到周期量级的超短激光脉冲在等离子体中可以以孤子形式传播 .它在一定密度等离子体中以较高的群速度向前传播 ,并在到达等离子体与真空界面时发生反射和透射 .当入射激光脉冲强度增大时 ,非线性调制效应使它产生较大的频率下移 ,致使光孤子传播速度变小 .另外 ,对于同样光强下的几十个周期以上的光脉冲 。
Using one-dimensional particle-in-cell simulations, we observed the formation of solitons which can move with high group velocities when ultrashort laser pulses at a few cycles only propagate in underdense plasma near the critical density. There exist reflection and transmission when the solitons arrive at the plasma-vacuum boundary. When the intensity of initial laser pulses increases, the velocity of the formed solitons decreases. When a laser pulse at a few tens of cycles propagates in such a plasma, a cluster of solitons are left behind, and trapped in the plasma.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2004年第3期798-802,共5页
Acta Physica Sinica
基金
国家自然科学基金 (批准号 :10 10 5 0 14
1982 5 110和 10 0 75 0 75 )
国家高技术惯性约束聚变基金资助的课题~~