Goulielmakis E, Schultze M, Hofstetter M, et al. Single-cycle nonlinear optics. Science, 2008, 320: 1614-1617 [2] Drescher M, Hentschel M, Kienberger R, et al. Time-resolved atomic inner-shell spectroscopy. Nature, 2002, 419: 803-807 [3] Krausz F, Ivanov M. Attosecond physics. Rev Mod Phys, 2009, 81: 163-234 [4] Scrinzi A, Ivanov M Y, Kienberger R, et al. Attosecond physics. J Phys B, 2006, 39: R1-R37 [5] Corkum P B. Plasma perspective on strong-field multiphoton ionization. Phys Rev Lett, 1993, 71: 1994-1997 [6] Corkum P B, Burnett N H, Ivanov M Y. Subfemtosecond pulses. Opt Lett, 1994, 19: 1870-1872 [7] Sansone G, Benedetti E, Calegari F, et al. Isolated single-cycle attosecond pulses. Science, 2006, 314: 443-446 [8] Chen J G, Zeng S L, Yang Y J. Generation of isolated sub-50-as pulses by quantum path control in the multicycle regime. Phys Rev A, 2010, 82: 043401 [9] Zhang G T, Liu X S. Generation of an extreme ultraviolet supercontinuum and isolated sub-50 as pulse in a two-colour laser field. J Phys B, 2009, 42: 125603 [10] Wu J, Zhang G T, Xia C L, et al. Control of the high-order harmonics cutoff and attosecond pulse generation through the combination of a chirped fundamental laser and a subharmonic laser field. Phys Rev A, 2010, 82: 013411 [11] Lu R F, He H X, Guo Y H, et al. Theoretical study of single attosecond pulse generation with a three-colour laser field. J Phys B, 2009, 42: 225601 [12] Orlando G, Corso P P, Fiordilino E, et al. Generation of isolated attosecond pulses using unipolar and laser fields. J Mod Opt, 2009, 56: 1761-1767 [13] Xiang Y, Niu Y P, Gong S Q. Control of the high-order harmonics cutoff through the combination of a chirped laser and static electric field. Phys Rev A, 2009, 79: 053419 [14] Zhao S F, Zhou X X, Li P C, et al. Isolated short attosecond pulse produced by using an intense few-cycle shaped laser and an ultraviolet attosecond pulse. Phys Rev A, 2008, 78: 063404 [15] Li P C, Zhou X X, Wang G L, et al. Isolated sub-30-as pulse generation of an He+ ion by an intense few-cycle chirped laser and its highorder harmonic pulses. Phys Rev A, 2009, 80: 053825 [16] 潘慧玲, 李鹏程, 周效信. 利用两束同色激光场和半周期脉冲驱动原子产生单个阿秒脉冲. 物理学报, 2011, 60: 043203 [17] Agostini P, DiMauro L F. Atoms in high intensity mid-infrared pulses. Contemp phys, 2008, 49: 179-197 [18] 李鹏程, 周效信, 董晨钟, 等. 强激光场中长程势与短程势原子产生高次谐波与电离特性研究. 物理学报, 2004, 53: 750-755 [19] Burnett K, Reed V C, Cooper J, et al. Calculation of the background emitted during high-harmonic generation. Phys Rev A, 1992, 45: 3347-3349 [20] Antoine P, Piraux B, Maquet A. Time profile of harmonics generated by a single atom in a strong electromagnetic field. Phys Rev A, 1995, 51: R1750-R1753 [21] Pérez-Hernández J A, Hoffmann D J, Za？r A, et al. Extension of the cut-off in high-harmonic generation using two delayed pulses of the same colour. J Phys B, 2009, 42: 134004
[2]
Goulielmakis E, Schultze M, Hofstetter M, et al. Single-cycle nonlinear optics. Science, 2008, 320: 1614-1617
[3]
Drescher M, Hentschel M, Kienberger R, et al. Time-resolved atomic inner-shell spectroscopy. Nature, 2002, 419: 803-807
[4]
Krausz F, Ivanov M. Attosecond physics. Rev Mod Phys, 2009, 81: 163-234
[5]
Scrinzi A, Ivanov M Y, Kienberger R, et al. Attosecond physics. J Phys B, 2006, 39: R1-R37
[6]
Corkum P B. Plasma perspective on strong-field multiphoton ionization. Phys Rev Lett, 1993, 71: 1994-1997
[7]
Corkum P B, Burnett N H, Ivanov M Y. Subfemtosecond pulses. Opt Lett, 1994, 19: 1870-1872
[8]
Sansone G, Benedetti E, Calegari F, et al. Isolated single-cycle attosecond pulses. Science, 2006, 314: 443-446
[9]
Chen J G, Zeng S L, Yang Y J. Generation of isolated sub-50-as pulses by quantum path control in the multicycle regime. Phys Rev A, 2010, 82: 043401
[10]
Zhang G T, Liu X S. Generation of an extreme ultraviolet supercontinuum and isolated sub-50 as pulse in a two-colour laser field. J Phys B, 2009, 42: 125603
[11]
Wu J, Zhang G T, Xia C L, et al. Control of the high-order harmonics cutoff and attosecond pulse generation through the combination of a chirped fundamental laser and a subharmonic laser field. Phys Rev A, 2010, 82: 013411
[12]
Lu R F, He H X, Guo Y H, et al. Theoretical study of single attosecond pulse generation with a three-colour laser field. J Phys B, 2009, 42: 225601
[13]
Orlando G, Corso P P, Fiordilino E, et al. Generation of isolated attosecond pulses using unipolar and laser fields. J Mod Opt, 2009, 56: 1761-1767
[14]
Xiang Y, Niu Y P, Gong S Q. Control of the high-order harmonics cutoff through the combination of a chirped laser and static electric field. Phys Rev A, 2009, 79: 053419
[15]
Zhao S F, Zhou X X, Li P C, et al. Isolated short attosecond pulse produced by using an intense few-cycle shaped laser and an ultraviolet attosecond pulse. Phys Rev A, 2008, 78: 063404
[16]
Li P C, Zhou X X, Wang G L, et al. Isolated sub-30-as pulse generation of an He+ ion by an intense few-cycle chirped laser and its highorder harmonic pulses. Phys Rev A, 2009, 80: 053825
Burnett K, Reed V C, Cooper J, et al. Calculation of the background emitted during high-harmonic generation. Phys Rev A, 1992, 45: 3347-3349
[21]
Antoine P, Piraux B, Maquet A. Time profile of harmonics generated by a single atom in a strong electromagnetic field. Phys Rev A, 1995, 51: R1750-R1753
[22]
Pérez-Hernández J A, Hoffmann D J, Za？r A, et al. Extension of the cut-off in high-harmonic generation using two delayed pulses of the same colour. J Phys B, 2009, 42: 134004
