[1] A H Zewail. Femtochemistry: atomic-scale dynamics of the chemical bond[J]. Phys Chem A, 2000, 104(24): 5660-5694.

[2] T Kanai, E J Takahashi, Y Nabekawa, et al.. Observing the attosecond dynamics of nuclear wavepackets in molecules by using high harmonic generation in mixed gases[J]. New J Phys, 2008, 10: 025036.

[3] F Krausz, M Ivanov. Attosecond physics[J]. Rev Mod Phys, 2009, 81(11): 163-234.

[4] P Agostini, L F DiMauro. The physics of attosecond light pulses[J]. Rep Prog Phys, 2004, 67(6): 813.

[5] E Goulielmakis, M Schultze, M Hofstetter, et al.. Single-cycle nonlinear optics[J]. Science, 2008, 320(5883): 1614-1617.

[6] 杜小杰, 周效信, 李鹏程. 利用中红外激光产生单个阿秒脉冲的理论研究[J]. 中国激光, 2010, 37(5): 1213-1217.

    Du Xiaojie, Zhou Xiaoxin, Li Pengcheng. Theoretical study on single attosecond pulse generated by midinfrared intense laser pulse[J]. Chinese J Lasers, 2010, 37(5): 1213-1217.

[7] 王骐, 陈建新, 陈德应, 等. 超短脉冲强激光场中氪的高次谐波研究[J]. 中国激光, 2001, 28(9): 793-796.

    Wang Qi, Chen Jianxin, Chen Deying, et al.. Study of high-order harmonic generation in Kr[J]. Chinese J Lasers, 2001, 28(9): 793-796.

[8] 夏元钦, 陈建新, 王骐. 超短脉冲强激光场中氙的高次谐波[J]. 中国激光, 2002, 29(11): 979-982.

    Xia Yuanqin, Chen Jianxin, Wang Qi. High-order harmonics in Xe using intense ultra-short laser pulse[J]. Chinese J Lasers, 2002, 29(11): 979-982.

[9] G Sansone, E Benedetti, F Calegari, et al.. Isolated single-cycle attosecond pulses[J]. Science, 2006, 314(5798): 443-446.

[10] Q G Li, W Y Hong, Q B Zhang, et al.. Isolated-attosecond-pulse generation from asymmetric molecules with an ω+2ω/3 multicycle two-color field[J]. Phys Rev A, 2010, 81(5): 053846.

[11] Q B Zhang, P X Lu, W Y Hong, et al.. Enhanced high-order harmonic generation via controlling ionization in spatially extended systems[J]. Phys Rev A, 2009, 79(5): 053406.

[12] P F Lan, P X Lu, W Cao, et al.. Single attosecond pulse generation from asymmetric molecules with a multicycle laser pulse[J]. Opt Lett, 2007, 32(9): 1186-1188.

[13] X B Bian, A D Bandrauk. Multichannel molecular high-order harmonic generation from asymmetric diatomic molecules[J]. Phys Rev Lett, 2010, 105(9): 093903.

[14] X B Bian, A D Bandrauk. Phase control of multichannel molecular high-order harmonic generation by the asymmetric diatomic molecule HeH2+ in two-color laser field[J]. Phys Rev A, 2011, 83(2): 023414.

[15] X B Bian, A D Bandrauk. Nonadiabatic molecular high-order harmonic generation from polar molecules: spectral redshift[J]. Phys Rev A, 2011, 83(4): 041403(R).

[16] G L Kamta, A D Bandrauk, P B Corkum. Asymmetry in the harmonic generation from nonsymmetric molecules[J]. J Phys B: At Mol Opt Phy, 2005, 38(20): L339-L346.

[17] S De, I Znakovskaya, D Ray, et al.. Field-free orientation of CO molecules by femtosecond two-color laser fields[J]. Phys Rev Lett, 2009, 103(105): 153002.

[18] P B Corkum. Plasma perspective on strong field multiphoton ionization[J]. Phys Rev Lett, 1993, 71(13): 1994-1997.

[19] W Y Hong, Q B Zhang, X S Zhu, et al.. Isolated attosecond pulse generation with the stability against the carrier-envelope phase shift and with the high-beam quality from CO gas medium[J]. Opt Express, 2011, 19(2): 26174-26185.

[20] H C Du, L Y Luo, X S Wang, et al.. Generating isolated elliptically polarized attosecond pulses from oriented CO gas medium using linearly polarized driving pulses[J]. Phys Rev A, 2012, 86(1): 013846.

[21] K J Betsch, N G Johnson, B Bergues, et al.. Controlled directional ion emission from several fragmentation channels of CO driven by a few-cycle laser field[J]. Phys Rev A, 2012, 86(6): 063403.

[22] P Agostini, L F DiMauro. Atoms in high intensity mid-infrared pulses[J]. Contemporary Physics, 2008, 49(3): 3179-3197.

[23] M Lewenstein, Ph Balcou, M Yu Ivanov, et al.. Theory of high-harmonic generation by low-frequency laser fields[J]. Phys Rev A, 1993, 49(3): 2117-2132.

[24] X X Zhou, X M Tong, Z X Zhao, et al.. Alignment dependence of high-order harmonic generation from N2 and O2 molecules in intense laser fields[J]. Phys Rev A, 2005, 72(3): 033412.

[25] X X Zhou, X M Tong, Z X Zhao, et al.. Role of molecular orbital symmetry on the alignment dependence of high-order harmonic generation with molecules[J]. Phys Rev A, 2005, 71(6): 061801.

[26] X M Tong, Z X Zhao, C D Lin. Theory of molecular tunneling ionization[J]. Phys Rev A, 2002, 66(3): 033402.

[27] S F Zhao, C Jin, A T Le, et al.. Determination of structure parameters in strong-field tunneling ionization theory of molecules[J]. Phys Rev A, 2010, 81(3): 033423.

[28] A Etches, L B Madsen. Extending the strong-field approximation of high-order harmonic generation to polar molecules: gating mechanisms and extension of the harmonic cutoff[J]. J Phys B, 2010, 43(15): 155602.

[29] M Abu-samha, L B Madsen. Photoelectron angular distributions from polar molecules probed by intense femtosecond lasers[J]. Phys Rev A, 2010, 82(4): 043413.

[30] P C Li, S Chu. Effects of macroscopic propagation on spectra of broadband supercontinuum harmonics and isolated-attosecond-pulse generation: coherent control of the electron quantum trajectories in two-color laser fields[J]. Phys Rev A, 2012, 86(1): 013411.