| 原子在红外激光场中产生高次谐波及阿秒脉冲随波长的变化规律 |
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| 引用本文： | 成春芝,周效信,李鹏程.原子在红外激光场中产生高次谐波及阿秒脉冲随波长的变化规律[J].物理学报,2011,60(3):33203-033203. |
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| 作者姓名： | 成春芝 周效信 李鹏程 |
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| 作者单位： | 西北师范大学物理与电子工程学院,兰州 730070 |
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| 基金项目： | 国家自然科学基金(批准号:11044007, 11047016),高等学校博士学科点专项科研基金(批准号:20096203110001),西北师范大学创新项目(批准号:NWNU-KJCXGC-03-62)资助的课题. |
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| 摘 要： | 利用强场近似理论,研究了在长波红外激光场(波长800—2000 nm)驱动下氢原子产生的高次谐波,分析了在截止位置附近高次谐波的转换效率随激光波长的变化规律.发现在截止位置附近原子发射高次谐波的转换效率比平台区域的转换效率低,但获得的阿秒脉冲的宽度会随波长的增大而缩短.
关键词：
强场近似
高次谐波
阿秒脉冲
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| 关 键 词： | 强场近似 高次谐波 阿秒脉冲 |
| 收稿时间： | 2010-03-26 |
The wavelength dependence of high-order harmonic generation and attosecond pulses from atom in infrared laser field |
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| Cheng Chun-Zhi,Zhou Xiao-Xin,Li Peng-Cheng.The wavelength dependence of high-order harmonic generation and attosecond pulses from atom in infrared laser field[J].Acta Physica Sinica,2011,60(3):33203-033203. |
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| Authors: | Cheng Chun-Zhi Zhou Xiao-Xin Li Peng-Cheng |
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| Institution: | College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China;College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China;College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China |
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| Abstract: | Basing on the strong-field approximation, we study high harmonic generation of hydrogen atom exposed to the long wavelength infrared laser field, and analyze the wavelength dependence of conversion efficiency of high-order harmonic generation near the cut-off position. It is found that high-order harmonic yield is much lower near cut-off than in the beginning of the plateau of the harmonic generation, but the width of the attosecond pulse is narrowed with increasing wavelength. |
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| Keywords: | strong-field approximation high-order harmonic attosecond pulse |
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