飞秒强激光场中氢原子团簇的各向异性膨胀

张春艳; 赵清; 傅立斌; 刘杰

doi:10.7498/aps.61.143601

摘要

利用LAMMPS程序研究了氢原子团簇在飞秒强激光场下的动力学行为, 讨论了引起小氢原子团簇各向异性膨胀的原因.通过对外电离过程中团簇内部电子的行为以及团簇各个方向上最外层质子距离团簇中心的距离随时间的变化情况的分析, 发现团簇的膨胀呈现各向异性,且引起这种各向异性的根源在于团簇内部电子的抖动以及逃逸.对氢原子团簇与强激光场相互作用过程中质子各能量分量以及各向异性程度随时间变化情况进行了研究,发现各向异性程度是随时间变化的, 这种各向异性程度首先随着激光电场的增强而增加,随后又逐渐减小,直到最后趋于某一大于1的稳定值.分析了激光脉冲结束后质子的平均能量与观测角之间的关系, 并将分析结果与Ditmire小组的实验结果进行了比较,发现我们的模拟结果在定性上与实验相符合.

关键词:

Abstract

In this paper, a simulation discussing the cause inducing the anisotropy of hydrogen cluster expansion is implemented by using LAMMPS tool for the molecule dynamics simulations. Through analyzing the behavior of electrons contained in the cluster and the variations of distance between outermost protons of all directions and cluster center with time, we clearly find that the expansion of hydrogen cluster is anisotropic, which is due mainly to the anisotropies of the quiver and escaping of electrons. Then we study the evolutions of proton energy component and anisotropic degree, and find that the anisotropic degree first increases with laser electric field increasing, then decreases gradually to a stable value greater than one. Additionally, we analyze the relationship between observation angle and average proton energy from hydrogen cluster irradiated by ultreshort laser pulse, and find that our simulation results accord with the experimental results qualitatively.

Keywords:

作者及机构信息

1.
北京理工大学理学院物理系, 北京 100081;

2.
北京应用物理与计算数学研究所, 北京 100088

基金项目: 国家重点基础研究发展计划(批准号: 2007CB921500, 2011CB921500)资助的课题.

Authors and contacts

1.
Department of Physics School of Science, Beijing Institute of Technology, Beijing 100081, China;

2.
Institute of Applied Physics and Computational Mathematics, Beijing 100088, China

Funds: Project supported by the National Basic Research Program of China (Grant Nos. 2007CB921500, 2011CB921500).

参考文献

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[2]	Ditmire T, Donnelly T, Rubenchik A M, Falcone R W, Perry M D 1996 Phys. Rev. A 53 3379
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[5]	Taguchi T M, Antonsen Jr T 2004 Phys. Rev. Lett. 92 205003
[6]	Li H Y, Liu J S, Wang C, Ni G Q, Li R X, Xu Z Z 2006 Phys. Rev. A 74 023201
[7]	Ditmire T, Tisch J W G, Sprimpring E, Mason M B, Hay N, Smith R A, Marangos J, Hutchinson M H R 1997 Nature 386 54
[8]	Last I, Jorthner J 1999 Phys. Rev. A 60 2215
[9]	McPherson A, Luk T S, Thompson B D, Borisov A B, Shiryaev B, Chen X, Boyer K, Rhodes C K 1994 Phys. Rev. Lett. 72 1810
[10]	McPerson A, Thompson B D, Bofisov A B, Boyer K, Rhodes K 2001 Nature 370 631
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[12]	Velotta R, Hay N, Mason M B, Castillejo M, Marangos J P 2001 Phys. Rev. Lett. 87 183901
[13]	Ditmire T, Gtisch J W, Yanovsky V P, Cowan T E, Hays G, Wharton K B 1999 Nature 398 489
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[15]	Mendham K J, Hay N, Mason M B, Tisch J W G, Marangos J P 2001 Phys. Rev. A 64 055201
[16]	Dammasch M, Dörr M, Eichmann U, Lenz E, Sandner W 2001 Phys. Rev. A 64 061402
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[22]	Kumarappan V, Krishnamurthy M 2001 Phys. Rev. Lett. 87 085005
[23]	Kumarappan V, Krishnamurthy M, Mathur D 2002 Phys. Rev. A 66 033203
[24]	Krishnamurthy M, Mathur D, Kumarappan V 2004 Phys. Rev. A 69 033202
[25]	Hirokane M, Shimizu S, Hashida M, Okada S, Okihara S, Sato F, Iida T, Sakabe S 2004 Phys. Rev. A 69 063201
[26]	Fennel T, Bertsch G F, Meiwes-Broer K H 2004 Eur. Phys. J. D 29 367
[27]	Jungreuthmayer C, Geissler M, Zanghellini J, Brabec T 2004 Phys. Rev. Lett. 92 133401
[28]	Symes D R, Hohenberger M, Henig A, Ditmire T 2007 Phys. Rev. Lett. 98 123401
[29]	Breizman B N, Arefiev A V, Fomyts'kyi M V 2005 Phys. Plasmas 12 056706
[30]	Sakabe S, Shimizu S, Hashida M, Sato F, Tsuyukushi T, Nishihara K, Okihara S, Kagawa T 2004 Phys. Rev. A 69 023203-1
[31]	Milchberg H M, McNaught S J, Parra E 2001 Phys. Rev. E 64 056402
[32]	Augst S, Meyerhofer D D, Strickland D, Chint S L 1991 J. Opt. Soc. Am. B 8 858

施引文献

[1]	Ditmire T, Smith R A, Tisch J W G, Hutchinson M H R 1997 Phys. Rev. Lett. 78 3121
[2]	Ditmire T, Donnelly T, Rubenchik A M, Falcone R W, Perry M D 1996 Phys. Rev. A 53 3379
[3]	Chen L M, Zhang J, Liang T J, Li Y T, Wang L, Jang W M 2000 Acta Phys. Sin. 49 529 (in Chinese) [陈黎明, 张杰, 梁天骄, 李玉同, 王龙, 江文勉 2000 49 529]
[4]	Xin G G, Ye D F, Zhao Q, Liu J 2011 Acta Phys. Sin. 60 094204 (in Chinese) [辛国国, 叶地发, 赵清, 刘杰 2011 60 094204]
[5]	Taguchi T M, Antonsen Jr T 2004 Phys. Rev. Lett. 92 205003
[6]	Li H Y, Liu J S, Wang C, Ni G Q, Li R X, Xu Z Z 2006 Phys. Rev. A 74 023201
[7]	Ditmire T, Tisch J W G, Sprimpring E, Mason M B, Hay N, Smith R A, Marangos J, Hutchinson M H R 1997 Nature 386 54
[8]	Last I, Jorthner J 1999 Phys. Rev. A 60 2215
[9]	McPherson A, Luk T S, Thompson B D, Borisov A B, Shiryaev B, Chen X, Boyer K, Rhodes C K 1994 Phys. Rev. Lett. 72 1810
[10]	McPerson A, Thompson B D, Bofisov A B, Boyer K, Rhodes K 2001 Nature 370 631
[11]	Krause J L, Schafer K J, Kulander K C 1992 Phys. Rev. Lett. 68 3535
[12]	Velotta R, Hay N, Mason M B, Castillejo M, Marangos J P 2001 Phys. Rev. Lett. 87 183901
[13]	Ditmire T, Gtisch J W, Yanovsky V P, Cowan T E, Hays G, Wharton K B 1999 Nature 398 489
[14]	Last I, Jorthner J 2002 J. Phys. Chem. A 6 10877
[15]	Mendham K J, Hay N, Mason M B, Tisch J W G, Marangos J P 2001 Phys. Rev. A 64 055201
[16]	Dammasch M, Dörr M, Eichmann U, Lenz E, Sandner W 2001 Phys. Rev. A 64 061402
[17]	Li H Y, Liu J S 2010 Acta Phys. Sin. 59 7850 (in Chinese) [李红玉, 刘建胜 2010 59 7850]
[18]	Lebeault M A, Viallon J, Chevaleyre J, Ellert C, Normand D, Schmidt M, Sublemontier O, Guet C, Huber B 2002 Eur. Phys. J. D 20 233
[19]	Vozzi C, Nisoli M, Caumes J P, Sansone G, Stagira S, De-Silvestri S, Vecchiocattivi M, Bassi D, Pascolini M, Poletto L, Villoresi P, Tondello G 2005 Appl. Phys. Lett. 86 111121
[20]	Issac R C, Vieux G, Ersfeld B, Brunetti E, Jamison S P, Gallacher J, Clark D, Jaroszynski D A 2004 Phys. Plasmas 11 3491
[21]	Rozet J P, Cornille M, Dobosz S, Dubau J, Gauthier J C, Jacquemot S, Lamour E, Lezius M, Normand D, Schmidt M, Vernhet D 2001 Phys. Scr. T92 113
[22]	Kumarappan V, Krishnamurthy M 2001 Phys. Rev. Lett. 87 085005
[23]	Kumarappan V, Krishnamurthy M, Mathur D 2002 Phys. Rev. A 66 033203
[24]	Krishnamurthy M, Mathur D, Kumarappan V 2004 Phys. Rev. A 69 033202
[25]	Hirokane M, Shimizu S, Hashida M, Okada S, Okihara S, Sato F, Iida T, Sakabe S 2004 Phys. Rev. A 69 063201
[26]	Fennel T, Bertsch G F, Meiwes-Broer K H 2004 Eur. Phys. J. D 29 367
[27]	Jungreuthmayer C, Geissler M, Zanghellini J, Brabec T 2004 Phys. Rev. Lett. 92 133401
[28]	Symes D R, Hohenberger M, Henig A, Ditmire T 2007 Phys. Rev. Lett. 98 123401
[29]	Breizman B N, Arefiev A V, Fomyts'kyi M V 2005 Phys. Plasmas 12 056706
[30]	Sakabe S, Shimizu S, Hashida M, Sato F, Tsuyukushi T, Nishihara K, Okihara S, Kagawa T 2004 Phys. Rev. A 69 023203-1
[31]	Milchberg H M, McNaught S J, Parra E 2001 Phys. Rev. E 64 056402
[32]	Augst S, Meyerhofer D D, Strickland D, Chint S L 1991 J. Opt. Soc. Am. B 8 858

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