啁啾激光与半周期脉冲形成的组合场驱动原子产生单个阿秒脉冲

李伟; 王国利; 周效信

doi:10.7498/aps.60.123201

摘要

提出了由波长为800 nm、脉冲宽度为5 fs的啁啾激光与半周期脉冲形成组合场,并利用这种组合场驱动一维模型氦原子获得单个阿秒脉冲. 通过数值求解一维氦原子的含时薛定谔方程,发现氦原子在组合场驱动下高次谐波谱的截止位置可以扩展到Ip+21.6Up. 对第二平台区域不同范围内高次谐波的叠加都能得到单个阿秒脉冲,最短可达37 as,特别是对平台区域的前端进行叠加不仅能够得到较短的单个阿秒脉冲,而且与截止位置附近高次谐波构造的阿秒脉冲相比,强度提高了3个数量级.

关键词:

Abstract

We propose an efficient method to generate an ultrashort attosecond pulse when a model He is exposed to the combination of an intense few-cycle chirped laser pulse and a half cycle pulse. By solving the time-dependent Schrdinger equation numerically, we find that the cut-off energy of the harmonics is extended effectively to Ip+21.6Up. By superimposing some high-order harmonics in different regions for the second plateau, the obtained pulses are all single attosecond ones. Minimum pulse achieves 37 as. Especially, by superimposing the lower order harmonics of the second plateau, one can obtain single attosecond pulse, and also the intensity of the single pulse is three order of magnitude higher than the attosecond pulse obtained near cut-off of harmonics.

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:11044007,11064013)、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 and Functional Materials of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China

参考文献

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施引文献

[1]	Krausz F, Ivanov M 2009 Rev. Mod. Phys. 81 163
[2]
[3]	Kaplan A E 1994 Phys. Rev. Lett. 73 1243
[4]	Agostini P, DiMauro L F 2004 Rep. Prog. Phys. 67 813
[5]
[6]	Corkum P B 1993 Phys. Rev. Lett. 71 1994
[7]
[8]
[9]	Hentschel M, Kienberger R, Spielmann C, Reider G A, Milosevic N, Brabec T, Corkum P, Heinzmann U, Drescher M, Krausz F 2001 Nature 414 509
[10]	Sansone G, Beendetti E, Calegari F, Vozzi C, Avaldi L, Flammini R, Poletto L, Villoresi P, Altucci C, Velotta R, Stagira S, Silvestri S D, Nisoli M 2006 Science 314 443
[11]
[12]	Goulielmakis E, Schultze M, Hofstetter M, Yakovlev V S, Gagnon J, Uiberacker M, Aquila A L, Gullikson E M, Attwood D T, Kienberger R, Krausz F, Kleineberg U 2008 Science 320 1614
[13]
[14]	Zeng Z N, Cheng Y, Song X H, Li R X, Xu Z Z 2007 Phys. Rev. Lett. 98 203901
[15]
[16]	Zhang G T, Liu X S 2009 J. Phys. B 42 125603
[17]
[18]	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]
[19]
[20]
[21]	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]
[22]
[23]	Chen J C, Zeng S L, Yang Y J 2010 Phys. Rev. A 82 043401
[24]	Du H C, Wang H Q, Hu B T 2010 Phys. Rev. A 81 063813
[25]
[26]	Lu R F, He H X, Guo Y H, Han K L 2009 J. Phys. B 42 225601
[27]
[28]
[29]	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]
[30]	Du H C, Hu B T 2010 Opt. Express 18 25958
[31]
[32]	Zhao S F, Zhou X X, Li P C, Chen Z J 2008 Phys. Rev. A 78 063404
[33]
[34]	Li P C, Zhou X X, Wang G L, Zhao Z X 2009 Phys. Rev. A 80 053825
[35]
[36]	Xiang Y, Niu Y P, Gong S Q 2009 Phys. Rev. A 79 053419
[37]
[38]
[39]	Xu J J, Zeng B, Xu Y L 2010 Phys. Rev. A 82 053822
[40]
[41]	Wu J, Zhang G T, Xia C L, Liu X S 2010 Phys. Rev. A 82 013411
[42]
[43]	Orlando G, Corso P P, Fiordilino E, Persico F 2009 J. Mod. Opt. 56 1761
[44]
[45]	Song X H, Yang W F, Zeng Z N, Li R X, Xu Z Z 2010 Phys. Rev. A 82 053821
[46]
[47]	Pan H L, Li P C, Zhou X X 2011 Acta Phys. Sin. 60 043203(in Chinese) [潘慧玲、李鹏程、周效信 2011 物理学报 60 043203]
[48]	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]
[49]
[50]
[51]	Burnett K, Reed V C, Cooper J, Knight P L 1992 Phys. Rev. A 45 3347
[52]
[53]	Antoine P, Piraux B, Maquet A 1995 Phys. Rev. A 51 R1750

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