中红外组合激光场调控宽带超连续谱的产生

陈东; 余本海; 汤清彬

doi:10.7498/aps.59.4564

摘要

本文对原子在波长为2000 nm、脉宽为12.5 fs的中红外驱动脉冲和脉宽为1.3 fs的紫外控制脉冲叠加形成的组合场中产生的高次谐波进行了研究.通过组合场驱动氦原子得到了谱宽为230 eV的超连续谱.利用组合场产生的谐波比单独利用中红外脉冲产生的谐波的强度高了3个量级.对超连续谱进行滤波并调节组合场中两束激光的延迟时间,可以直接产生100 as的单个脉冲.我们发现超连续谱的宽度和位置几乎不会因为驱动场和控制场强度的变化而改变,这种性质有利于从实验上获得单个宽谱阿秒脉冲.

关键词:

Abstract

By solving the one-dimensional time-dependent Schr?dinger equation with split-operator method, we study the high harmonics generated by helium atom, and analyse the characteristics of the attosecond pulses generated by the high-order harmonics. By adopting a mid-infrared driving pulse (with wavelength of 2000 nm and pulse duration of 12.5 fs) combined with a short UV controlling pulse, a smooth supercontinuum with the bandwidth of 230 eV is observed. By adjusting the delay between the mid-infrared and ultraviolet fields, the contribution of the short quantum trajectory can be efficiently enhanced and an isolated 100 as pulse seems achievable. We found that the supercontinuum is not sensitive to the intensities of the two lasers, which facilitates the experimental implementation for the isolated attosecond pulse generation.

Keywords:

作者及机构信息

1.
信阳师范学院物理电子工程学院,信阳 464000

基金项目: 河南省科技计划(批准号: 082300410050)资助的课题.

Authors and contacts

1.
College of Physics and Electronic Engineering, Xinyang Normal University, Xinyang 464000, China

参考文献

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施引文献

[1]	Brabec T, Krausz F 2000 Rev. Mod. Phys. 72 545
[2]	Liao Q, Lu P X, Lan P F, Cao W, Li Y H 2008 Phys. Rev. A 77 013408
[3]	Zhou Y M, Liao Q, Lu P X 2009 Phys. Rev. A 80 023412
[4]	Drescher M, Hentschel M, Kienberger R, Tempea G, Spielmann C, Reider G A, Corkum P B, Krausz F 2001 Science 291 1923
[5]	Cao W, Lan P F, Lu P X 2006 Acta Phys. Sin. 55 2115 (in Chinese) [曹伟、兰鹏飞、陆培祥 2006 55 2115]
[6]	Corkum P 1993 Phys. Rev. Lett. 71 1994
[7]	Hentschel M, Kienberger R, Spielmann C, Reider G A, Milosevic N, Brabec T, Corkum P B, Heinzmann U, Drescher M, Krausz F 2001 Nature 414 509
[8]	Sansone G, Benedetti E, Calegari F, Vozzi C, Avaldi L, Flammini R, Poletto L, Villoresi P, Altucci C, Velotta R, Stagira S, de Silvestri S, Nisoli M 2006 Science 314 433
[9]	Lan P F, Lu P X, Cao W, Wang X L 2007 Phys. Rev. A 76 043808
[10]	Zeng Z N, Cheng Y, Song X H, Li R X, Xu Z Z 2007 Phys. Rev. Lett. 98 203901
[11]	Hong W Y, Li Y H, Lu P X, Lan P F, Zhang Q B, Wang X B 2008 J. Opt. Soc. Am. B 25 1684
[12]	Wang S Y, Hong W Y, Lan P F, Zhang Q B, Lu P X 2009 J. Phys. B 42 105601
[13]	Cao W, Lu P X, Lan P F, Wang X L, Yang G 2007 Opt. Express 15 530
[14]	Cao W, Lu P X, Lan P F, Hong W Y, Wang X L 2007 J. Phys. B 40 869
[15]	Lan P F, Lu P X, Li Q G, Li F, Hong W Y, Zhang Q B 2009 Phys. Rev. A 79 043413
[16]	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
[17]	Lan P F, Lu P X, Cao W, Li Y H, Wang X L 2007 Phys. Rev. A 76 R051801
[18]	Li Q G, Lan P F, Hong W Y, Zhang Q B, Lu P X 2009 Acta Phys. Sin. 58 5679 (in Chinese) [李钱光、兰鹏飞、洪伟毅、张庆斌、陆培祥2009 58 5679]
[19]	Lan P F, Lu P X, Cao W, Wang X L, Hong W Y 2007 Opt. Lett. 32 1186
[20]	Lan P F, Lu P X, Cao W, Li Y H, Wang X L 2007 Phys. Rev. A 76 021801
[21]	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
[22]	Takahashi E, Kanai T, Ishikawa K, Nabekawa Y, Midorikawa K 2008 Phys. Rev. Lett. 101 253901
[23]	Tate J, Auguste T, Muller H G, Saliéres P, Agostini P, DiMauro L F 2007 Phys. Rev. Lett. 98 013901
[24]	Eberly J H, Su Q, Javanainen J 1989 Phys. Rev. Lett. 62 811
[25]	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 58 4914]
[26]	Zhang Q B, Lu P X, Lan P F, Hong W Y, Yang Z Y 2008 Opt. Express 16 9795
[27]	Ferr M D, Fleck Jr J A, Steiger A 1982 J. Appl. Phys. 47 412
[28]	Burnett K, Reed V C, Cooper J, Knight P L 1992 Phys. Rev. A 45 3347
[29]	Hong W Y, Lu P X, Lan P F, Zhang Q B, Wang X B 2009 Opt. Express 17 5139
[30]	Li Q G, Lu P X, Lan P F, Hong W Y, Zhang Q B 2009 J. Phys. B 42 165601
[31]	Hong W Y, Lu P X, Li Q G, Zhang Q B 2009 Opt. Lett. 34 2102
[32]	Antoine P, L’Huillier A, Lewenstein M 1996 Phys. Rev. Lett. 76 1234
[33]	Lewenstein M, Balcou P, Ivanov M Y, L’Huillier A, Corkum P B 1994 Phys. Rev. A 49 2117
[34]	Mairesse Y, de Bohan A, Frasinski L J, Merdji H, Dinu L C, Monchicourtl P, Breger P, Kovaocev M, Taieb R, Carrec B, Muller H G, Agostini P, Salieres P 2003 Science 302 1540
[35]	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 58 1579]
[36]	Lan P F, Lu P X, Cao W, Wang X L, Yang G 2006 Phys. Rev. A 74 063411

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