强激光场中模型氢原子和真实氢原子产生高次谐波的比较  

High order harmonic generation comparison of model hydrogen atoms and real hydrogen atom in intense laser field

作　　者：李会山[1,2] 李鹏程[1] 周效信[1] 

机构地区：[1]西北师范大学物理与电子工程学院,兰州730070 [2]青海大学基础部,西宁810016

出　　处：《原子与分子物理学报》2009年第3期524-528,共5页Journal of Atomic and Molecular Physics

基　　金：国家自然科学基金(10674112);甘肃省自然科学基金(3ZS061-A25-013);甘肃省教育厅基金(0601-23);西北师范大学创新项目(NWNU-KJCXGC-03-21)

摘　　要：通过数值求解原子在强激光场中的含时薛定谔方程,研究了有库仑奇点和无库仑奇点的一维模型氢原子和三维真实氢原子产生高次谐波的特性.结果表明,有库仑奇点和无库仑奇点的一维模型氢原子和三维真实氢原子产生高次谐波的截止位置相同,但是高次谐波强度变化特征明显不同,进一步的研究表明,无库仑奇点的模型氢原子产生的高次谐波谱相对变化趋势与三维真实氢原子的高次谐波谱变化趋势是完全一致的.By solving time-dependent Schr(o|¨)dinger equation numerically, we investigate the high-order harmonic generation (HHG) of one-dimensional model hydrogen atoms with Coulomb singularity potential, none Coulomb singularity potential and three-dimensional hydrogen atom exposed to intense laser field. Our results show that the high order harmonic generation cut-off positions are same between them, but the intensities of HHG for different atoms are different. Further investigation shows that the relative intensity of HHG for the model hydrogen atom with none Coulomb singularity potential has very similar behavior with that of real three-dimensional hydrogen atom.

关 键 词：强激光场 模型势 高次谐波 

分 类 号：O562.4[理学—原子与分子物理]