超短脉冲谐波截止频率与载波包络相位关系的研究  

Carrier-envelope-phase dependence of the cutoff frequency of ultra-short laser pulse on high-order harmonic generation

作　　者：刘烨[1] 陈光龙[1] 曹云玖[1] 

机构地区：[1]上海工程技术大学基础教学学院,上海201620

出　　处：《原子与分子物理学报》2011年第2期271-276,共6页Journal of Atomic and Molecular Physics

基　　金：上海高校选拔培养优秀青年教师科研专项基金(gjd08028)

摘　　要：采用Lewenstein模型计算了两个不同脉宽的超短脉冲高次谐波截止频率与包络载波相位的关系,结果显示,其截止频率随载波包络相位的增加先减小后增加.随着脉冲宽度的减小,高次谐波截止频率变化的幅度增加.我们按准经典的三步模型解释所得结果,并讨论了量子辐射效应.We investigate the relationship between the cutoff frequencies of the high-order harmonic gen- eration spectrum for ultra-short laser pulses with different pulse durations and the carrier-envelope pha- ses by using the Lewenstein model. It is shown that as the carrier phase increases the cutoff frequency decreases at first and then increases. The variation range of the cutoff frequencies rise with the pulse duration decreasing. The ＂three-step＂ model gives a reasonable explanation for the numerical results and, at the same time, some quantum effects are presented.

关 键 词：超短脉冲 高次谐波产生 截止频率 载波包络相位 

分 类 号：O562[理学—原子与分子物理]