双色场驱动不对称分子气体产生平台区超连续光谱

李钱光; 易煦农; 张秀; 吕昊; 丁么明

doi:10.7498/aps.60.017203

摘要

研究了双色场驱动下不对称分子气体产生的高次谐波. 通过计算机数值模拟,发现当波长为800 nm,脉宽为10 fs的基频场和波长为1200 nm的控制场组成的多光周期双色场作用于不对称分子时,不对称分子的高次谐波在平台区的末端呈现出超连续结构. 超连续谱谱宽达80 eV,可以支持傅里叶极限脉宽为50 as的脉冲输出. 传播后,超连续谱变得更平滑,而且,直接选取超连续谱上的一段,可以得到脉宽约为90 as的单个脉冲输出.

关键词:

超连续谱 /
阿秒脉冲

Abstract

The high order harmonic generation (HHG) from asymmetric molecular gas in two-color field has been investigated and a method for broadband supercontinuum generation in the plateau by asymmetric molecular gas exposed to multicycle laser pulse is proposed. The numerical simulation shows that the harmonics at the end of the plateau become continuous and form a supercontinuum with a bandwidth of about 80 eV, from which a 50 as pulse in the transform limited case can be generated, when asymmetric molecules are exposed to a multicycle two-color field, which is synthesized by a 10 fs/800 nm fundamental pulse and a 15 fs/1200 nm control pulse. After propagation through the molecular gas, most of the modulations in the supercontinuum are eliminated, and the supercontinuum becomes smoother, from which a 90 as isolated pulse can be produced.

Keywords:

supercontinuum /
attosecond pulse

作者及机构信息

1.
孝感学院物理与电子信息工程学院,孝感 432000

基金项目: 湖北省教育厅科学技术重大项目(批准号:Z20082601)、湖北省自然科学基金(项目批准号:2009930和2009932)资助的课题.

Authors and contacts

1.
School of Physics and Electronic-information Engineering, Xiaogan College, Xiaogan 432000,Chian

参考文献

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施引文献

[1]	Drescher M, Hentschel M, Kienberger R, Uiberacker M, Yakovelv V, Scrinzi A, Westerwalbesloh T, Kleineberg U, Heinzmann U, Krausz F 2002 Nature (London) 419 803
[2]	Goulielmakis E, Yakovlev S V, Cavalieri A L, Uiberacker M, Pervak V, Apolonski V, Kienberger R, Kleineberg U, Krausz F 2007 Science 317 769
[3]	Hentschel M , Kienberger R, Spielmann C, Reider G A, Milosevic N, Brabec T, Corkum P B, Heinzmann U, Drescher M, Krausz F 2001 Nature (London) 414 509
[4]	Paul P M, Toma E S, Breger P, Mullot G, Auge F, Balcou P, Muller H G, Agostini P 2001 Science 292 1689
[5]	Sansone G, Benedetti 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
[6]	Lan P F, Lu P X, Cao W, Wang X L, Yang G 2006 Phys. Rev. A 74 063411
[7]	Cao W, Lan P F, Lu P X 2007 Acta Phys. Sin. 56 2482 (in Chinses)[曹伟、兰鹏飞、陆培祥 2007 物理学报 56 2482]
[8]	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
[9]	Hong W Y, Lu P X, Lan P F, Yang Z Y, Li Y H,Liao Q 2008 Phys. Rev. A 77 033410
[10]	Zhai Z, Yu R F, Liu X S, Yang Y J 2008 Phys. Rev. A 78 041402
[11]	Zheng Y H, Zeng Z N, Li X F, Chen X W, Liu P, Xiong H, Lu H, Zhao S T, Wei P F, Zhang L, Wang Z G, Liu J, Cheng Y, Li R X, Xu Z Z 2008 Opt. Lett. 33 234
[12]	Corkum P B 1993 Phys. Rev. Lett. 71 1994
[13]	Christov P, Murnane M M, Kapteyn H C 1997 Phys. Rev. Lett. 78 1251
[14]	Corkum P B, Burnett N H,Ivanov M Y 1994 Opt. Lett. 19 1870
[15]	Cao W,Lu P X, Lan P F, Wang X L, Li Y H 2007 Phys. Rev. A 75 063423
[16]	Zeng Z N, Cheng Y, Song X H, Li R X, Xu Z Z 2007 Phys. Rev. Lett. 98 203901
[17]	Hong W Y, Lu P X, Cao W, Lan P F, Wang X L 2007 J. Phys. B 40 2321
[18]	Cao W, Lu P X, Lan P F, Hong W Y, Wang X L 2007 J. Phys. B 40 869
[19]	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]
[20]	Hong W Y, Yang Z Y, Lan P F, Lu P X 2008 Acta Phys. Sin. 57 5853 (in Chinese)[洪伟毅、杨振宇、兰鹏飞、陆培祥 2008 物理学报 57 5853]
[21]	Lan P F, Lu P X, Cao W, Li Y H, Wang X L 2007 Phys. Rev. A 76 051801 (R)
[22]	Lan P F, Lu P X, Cao W, Li Y H, Wang X L 2007 Phys. Rev. A 76 011402(R)
[23]	Zheng Y H, Zeng Z N, Zou P, Zhang L, Li X F, Liu P, Li R X, Xu Z Z 2009 Phys. Rev. Lett. 103 043904
[24]	Hong W Y, Lu P X, Lan P F, Zhang Q B, Wang X B 2009 Opt. Express 17 5139
[25]	Pfeifer T, Gallmann L, Abel M J, Neumark D M, Leone S R 2006 Opt. Lett. 31 975
[26]	Cao W, Lu P X, Lan P F, Wang X L, Yang G 2006 Phys. Rev. A 74 063821
[27]	Zhang Q B, Lu P X, Lan P F, Hong W Y, Yang Z Y 2008 Optics Express 16 9795
[28]	Cao W, Lu P X, Lan P F, Wang X L, Yang G 2007 Opt. Express 15 530
[29]	Liao Q, Lu P X, Zhang Q B, Yang Z Y, Wang X B 2008 Opt. Express 16 17070
[30]	Liao Q, Lu P X, Lan P F, Cao W, Li Y H 2008 Phys. Rev. A 77 013408
[31]	Kamta G L, Bandrauk A D, Corkum P B 2005 J. Phys. B 38 339
[32]	Lan P F, Lu P X, Cao W, Li Y H, Wang X L 2007 Phys. Rev. A 76 021801
[33]	Lan P F, Lu P X, Cao W, Wang X L, Hong W Y 2007 Opt. Lett. 32 1186
[34]	Zhang Q B, Lu P X, Hong W Y, Liao Q, Wang S Y, 2009 Physical Review A 80 033405
[35]	Stapelfeldt H, Seideman T, 2003 Rev. Mod. Phys. 75 543
[36]	Goban A, Minemoto S, Sakai H 2008 Phys. Rev. Lett. 101 013001
[37]	Ben I I, Gertner I, Heber O, Rosner B 1993 Phys. Rev. Lett. 71 1347
[38]	Lan P F, Lu P X, Li F, Li Q G, Hong W Y, Zhang Q B, Yang Z Y, Wang X B 2008 Opt. Express 16 17542
[39]	Feit M D, Fleck J A, Jr, Steiger A 1982 J. Comput. Phys. 47 412
[40]	Burnett K, Reed V C, Cooper J, Knight P L 1992 Phys. Rev. A 45 3347
[41]	Vafaee M, Sabzyan H, Vafaee Z, Katanforoush A 2006 Phys. Rev. A 74 043416
[42]	Priori E, Cerullo G, Nisoli M, Stagria S, De Silvestri S 2000 Phys. Rev. A 61 063801
[43]	Zhang Q B, Lu P X, Hong W Y, Liao Q, Lan P F,Wang X B 2009 Phys. Rev. A 79 053406
[44]	Yudin G L, Bandrauk A D, Corkum P B 2006 Phys. Rev. Lett. 96 063002

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