联合双原子在组合脉冲辐照下的高次谐波发射

High-order harmonic generation of a united-atom model irradiated by combined laser pulses

首先采用经典的“三步模型”理论,分析了一维普薛耳—特勒势(P-T势)模型原子在组合脉冲作用下的动力学行为,进而利用该组合脉冲辐照联合双原子模型,通过调节组合脉冲的场幅、相位以及设定原子的核间距,使原子有适当的电离和较大的复合效率,因而在截止位置远达Ip+8Up处获得了效率高达10-9的高次谐波发射.

The dynamic behavior of a P-T potential model atom exposed to particularly designed laser pulses has been carefully analyzed by employing the classical 'three-step model' theory.We present a high-order harmonic generation(HHG) spectrum from a united-atom system exposed to the laser pulses mentioned above,the emission efficiencies of the harmonics near the cutoff(I_p+8U_p) are especially enhanced to 10^(-9).It is shown that the amplitudes,the phases of the combined lasers,and the inter-nuclear separation are crucial factors in obtaining the high efficiency of the HHG.