利用两色组合激光场驱动氦原子产生单个阿秒脉冲

黄峰; 李鹏程; 周效信

doi:10.7498/aps.61.233203

摘要

对由波长为1600 nm和800 nm两色激光形成组合场驱动氦原子产生的高次谐波进行了研究, 通过改变组合场中主要发射高次谐波期间电场的上升沿和下降沿随时间不同的变化率, 使电子长路经和短路径发射谐波的特性发生变化,将由此产生的高次谐波进行叠加时可以得到更短的阿秒脉冲,再调节两束激光场的延迟时间,能够有效地实现抑制电子短路径的贡献, 从而得到脉宽为33.7 as的单个阿秒脉冲.

关键词:

组合场 /
高次谐波 /
阿秒脉冲

We theoretically study the high-order harmonic generation (HHG) of a model He atom exposed to a combined field of 1600 nm and 800 nm laser pulses. The changing of rising rate and falling rate with time for the combined filed during main HHG, can present the different characteristics of high-order harmonic generation from the short electron trajectories and the long electron trajectories. By superimposing several harmonics generated from He atom driven by the combined field, we could obtain shorter attosecond pulses. Finally, by adjusting the time delay between two laser pulses, we can effectively suppress the contribution of the short electron trajectories to HHG, and obtain an isolated attosecond pulse with duration 33.7 as.

Keywords:

作者及机构信息

1.
西北师范大学物理与电子工程学院,甘肃省原子分子物理与功能材料重点实验室, 兰州 730070

基金项目: 国家自然科学基金(批准号: 11044007, 11047016, 11264036)、高等学校博士学科点专项科研基金(批准号: 20096203110001) 和西北师范大学创新基金(批准号: NWNU-KJCXGC-03-62)资助的课题.

Authors and contacts

1.
Key Laboratory of Atomic and Molecular Physics & Functional Materials of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China

Funds: Project supported by the National Natural Science Foundation of China (Grant Nos. 11044007, 11047016, 11264036), the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20096203110001), and the Innovative Foundation of Northwest Normal University (Grant No. NWNU-KJCXGC-03-62).

参考文献

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[2]	Winterfeldt C, Spielmann C, Gerber G 2008 Rev. Mod. Phys. 80 117
[3]	Corkum P B 1993 Phys. Rev. Lett. 71 1994
[4]	Paul P M, Toma E S, Breger P 2001 Science 292 1689
[5]	Mairesse Y, DeBohan A, Frasinski L J 2003 Science 302 1540
[6]	Sansone G, Benedetti E, Calegari F 2006 Science 314 443
[7]	Du H C, Wang H Q, Hu B T 2010 Phys. Rev. A 81 063813
[8]	Chen J G, Zeng S L, Yang Y J 2010 Phys. Rev. A 82 043401
[9]	Xia C L, Liu X S 2012 Acta Phys. Sin. 61 043303 (in Chinese) [夏昌龙, 刘学深 2012 物理学报 61 043303]
[10]	Hong W Y, Yang Z Y, Lan P F, Zhang Q B, Li Q G, Lu P X 2009 Acta Phys. Sin. 58 4914 (in Chinese) [洪伟毅, 杨振宇, 兰鹏飞, 张庆斌, 李钱光, 陆培祥 2009 物理学报 58 4914]
[11]	Lu R F, He H X, Guo Y H 2009 J. Phys. B 42 22560
[12]	Orlando G, Corso P P, Fiordilino E 2009 J. Mod. Opt. 56 1761
[13]	Li P C, Zhou X X, Wang G L, Zhao Z X 2009 Phys. Rev. A 80 053825
[14]	Xiang Y, Niu Y P, Gong S Q 2009 Phys. Rev. A 79 053419
[15]	Chen J G ,Yang Y J, Chen Y 2011 Acta Phys. Sin. 60 033202 (in Chinese) [陈基根, 杨玉军, 陈漾 2011 物理学报 60 033202]
[16]	Pan H L, Wang G L, Zhou X X 2011 Chinese Sci. Bull. 56 2561 (in Chinese) [潘慧玲, 王国利, 周效信 2011 科学通报 56 2561]
[17]	Liu I L, Li P C, Chu S I 2011 Phys. Rev. A 84 033414
[18]	Li P C, Zhou X X, Dong C Z, Zhao S F 2004 Acta Phys. Sin. 53 750 (in Chinese) [李鹏程, 周效信, 董晨钟, 赵松峰 2004 物理学报 53 750]
[19]	Burnett K, Reed V C, Cooper J, Knight P L 1992 Phys. Rev. A 45 3347
[20]	Antoine P, Piraux B, Maquet A 1995 Phys. Rev. A 51 R1750
[21]	Pérez-Hernández J A, Hoffmann D J 2009 J. Phys. B 42 134004
[22]	Ye X L, Zhou X X, Zhao S F, Li P C 2009 Acta Phys. Sin. 58 1579 (in Chinese) [叶小亮, 周效信, 赵松峰, 李鹏程 2009 物理学报 58 1579]

施引文献

[1]	Krausz F, Ivanov M 2009 Rev. Mod. Phys. 81 163
[2]	Winterfeldt C, Spielmann C, Gerber G 2008 Rev. Mod. Phys. 80 117
[3]	Corkum P B 1993 Phys. Rev. Lett. 71 1994
[4]	Paul P M, Toma E S, Breger P 2001 Science 292 1689
[5]	Mairesse Y, DeBohan A, Frasinski L J 2003 Science 302 1540
[6]	Sansone G, Benedetti E, Calegari F 2006 Science 314 443
[7]	Du H C, Wang H Q, Hu B T 2010 Phys. Rev. A 81 063813
[8]	Chen J G, Zeng S L, Yang Y J 2010 Phys. Rev. A 82 043401
[9]	Xia C L, Liu X S 2012 Acta Phys. Sin. 61 043303 (in Chinese) [夏昌龙, 刘学深 2012 物理学报 61 043303]
[10]	Hong W Y, Yang Z Y, Lan P F, Zhang Q B, Li Q G, Lu P X 2009 Acta Phys. Sin. 58 4914 (in Chinese) [洪伟毅, 杨振宇, 兰鹏飞, 张庆斌, 李钱光, 陆培祥 2009 物理学报 58 4914]
[11]	Lu R F, He H X, Guo Y H 2009 J. Phys. B 42 22560
[12]	Orlando G, Corso P P, Fiordilino E 2009 J. Mod. Opt. 56 1761
[13]	Li P C, Zhou X X, Wang G L, Zhao Z X 2009 Phys. Rev. A 80 053825
[14]	Xiang Y, Niu Y P, Gong S Q 2009 Phys. Rev. A 79 053419
[15]	Chen J G ,Yang Y J, Chen Y 2011 Acta Phys. Sin. 60 033202 (in Chinese) [陈基根, 杨玉军, 陈漾 2011 物理学报 60 033202]
[16]	Pan H L, Wang G L, Zhou X X 2011 Chinese Sci. Bull. 56 2561 (in Chinese) [潘慧玲, 王国利, 周效信 2011 科学通报 56 2561]
[17]	Liu I L, Li P C, Chu S I 2011 Phys. Rev. A 84 033414
[18]	Li P C, Zhou X X, Dong C Z, Zhao S F 2004 Acta Phys. Sin. 53 750 (in Chinese) [李鹏程, 周效信, 董晨钟, 赵松峰 2004 物理学报 53 750]
[19]	Burnett K, Reed V C, Cooper J, Knight P L 1992 Phys. Rev. A 45 3347
[20]	Antoine P, Piraux B, Maquet A 1995 Phys. Rev. A 51 R1750
[21]	Pérez-Hernández J A, Hoffmann D J 2009 J. Phys. B 42 134004
[22]	Ye X L, Zhou X X, Zhao S F, Li P C 2009 Acta Phys. Sin. 58 1579 (in Chinese) [叶小亮, 周效信, 赵松峰, 李鹏程 2009 物理学报 58 1579]

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