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| 强激光场中原子的束缚态和连续态对高次谐波的影响 | |
| 引用本文： | 周效信,李白文. 强激光场中原子的束缚态和连续态对高次谐波的影响[J]. 物理学报, 2001, 50(10): 1902-1906 |
| 作者姓名： | 周效信 李白文 |
| 作者单位： | (1)西北师范大学物理系,兰州730070;中国科学院武汉物理与数学研究所波谱与原子分子物理国家重点实验室,武汉430071; (2)中国科学院武汉物理与数学研究所波谱与原子分子物理国家重点实验室,武汉430071 |
| 基金项目： | 国家自然科学基金(批准号:19734060,19874051)资助的课题. |
| 摘 要： | 利用基函数展开结合线性最小二乘法方法求解含时薛定谔方程,研究了一维原子在强激光场中产生高次谐波过程中,束缚态和连续态以及它们的干涉效应对高次谐波的影响.结果表明,低能的高次谐波是由束缚态束缚态之间的相互作用产生的,高能的高次谐波是由束缚态连续态之间的相互作用产生的,而截断频率后消失的高次谐波是由于束缚态束缚态与束缚态连续态之间存在干涉效应的结果关键词：线性最小二乘法强激光场高次谐波的产生 |
| 关 键 词： | 线性最小二乘法 强激光场 高次谐波的产生 |
| 收稿时间： | 2001-01-07 |
| 修稿时间： | 2001-01-07 |
CONTRIBUTION OF THE BOUND STATES AND CONTINUUM STATES OF AN ATOM IN INTENSE LASERFIELDS TO HIGH HARMONIC GENERATION |
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| ZHOU XIAO-XIN and LI BAI-WEN. CONTRIBUTION OF THE BOUND STATES AND CONTINUUM STATES OF AN ATOM IN INTENSE LASERFIELDS TO HIGH HARMONIC GENERATION[J]. Acta Physica Sinica, 2001, 50(10): 1902-1906 | |
| Authors: | ZHOU XIAO-XIN and LI BAI-WEN |
| Abstract: | Solving the time-dependent Schrodinger equation for a one-dimensional atom in an intense laser field based on the basis function expansion and a linear-least-squares fitting method, we examine the influence of the bound states,-continuum states and the interference between them of the model atom on the high harmonic generation. It is found that the main contributions to the low-energy harmonic generations come from the bound-bound interaction, while the high-energy harmonic generations are from the bound-continuum interaction. Beyond the cut-off, the interference of the bound-bound and bound-continuum interactions leads to the disappearance of the harmonic generation. |
| Keywords: | a linear-least-squares fitting method intense laser field high harmonic generation |
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