[1] Goulielmakis E, Loh Z H, Wirth A et al. Real-time observation of valence electron motion[J]. Nature, 466, 739-743(2010).

[2] Li M, Xie H, Cao W et al. Photoelectron holographic interferometry to probe the longitudinal momentum offset at the tunnel exit[J]. Physical Review Letters, 122, 183202(2019).

[3] Baker S, Robinson J S, Haworth C A et al. Probing proton dynamics in molecules on an attosecond time scale[J]. Science, 312, 424-427(2006).

[4] He L X, Zhang Q B, Lan P F et al. Monitoring ultrafast vibrational dynamics of isotopic molecules with frequency modulation of high-order harmonics[J]. Nature Communications, 9, 1108(2018).

[5] Li X H, Liu W W, Song Y L et al. Enhancement of the second harmonic generation from WS2 monolayers by cooperating with dielectric microspheres[J]. Advanced Optical Materials, 7, 1801270(2019).

[6] Wei W J, Jiang X X, Dong L Y et al. Regulating second-harmonic generation by van der Waals interactions in two-dimensional lead halide perovskite nanosheets[J]. Journal of the American Chemical Society, 141, 9134-9139(2019).

[7] Neppl S, Ernstorfer R, Cavalieri A L et al. Direct observation of electron propagation and dielectric screening on the atomic length scale[J]. Nature, 517, 342-346(2015).

[8] Li L, Lan P F, Zhu X S et al. Reciprocal-space-trajectory perspective on high-harmonic generation in solids[J]. Physical Review Letters, 122, 193901(2019).

[9] Wei Z Y, Zhong S Y, He X K et al. Progresses and trends in attosecond optics[J]. Chinese Journal of Lasers, 48, 0501001(2021).

[10] Kaldun A, Blättermann A, Stooß V et al. Observing the ultrafast buildup of a Fano resonance in the time domain[J]. Science, 354, 738-740(2016).

[11] Pertot Y, Schmidt C, Matthews M et al. Time-resolved X-ray absorption spectroscopy with a water-window high-harmonic source[J]. Science, 355, 264(2017).

[12] Dai C, Wang Y, Miao Z M et al. Generation and application of high-order harmonics based on interaction between femtosecond laser and matter[J]. Laser & Optoelectronics Progress, 58, 0300001(2021).

[13] Stapelfeldt H, Seideman T. Colloquium: aligning molecules with strong laser pulses[J]. Reviews of Modern Physics, 75, 543-557(2003).

[14] Bian X B, Bandrauk A D. Probing nuclear motion by frequency modulation of molecular high-order harmonic generation[J]. Physical Review Letters, 113, 193901(2014).

[15] Zhang C P, Xia C L, Jia X F et al. Multiple rescattering processes in high-order harmonic generation from molecular system[J]. Optics Express, 24, 20297-20308(2016).

[16] Feng L Q, Li W L. Nuclear signature effect on spatial distribution of molecular harmonic in the presence of spatial inhomogeneous field[J]. Laser Physics, 27, 016002(2017).

[17] Lan P F, Lu P X, Cao W et al. Attosecond ionization gating for isolated attosecond electron wave packet and broadband attosecond xuv pulses[J]. Physical Review A, 76, 051801(2007).

[18] Hong W Y, Li Y H, Lu P X et al. Control of quantum paths in the multicycle regime and efficient broadband attosecond pulse generation[J]. Journal of the Optical Society of America B, 25, 1684-1689(2008).

[19] De S, Znakovskaya I, Ray D et al. Field-free orientation of CO molecules by femtosecond two-color laser fields[J]. Physical Review Letters, 103, 153002(2009).

[20] Hong W Y, Zhang Q B, Zhu X S 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]. Optics Express, 19, 26174-26185(2011).

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

[22] Corkum P B. Plasma perspective on strong field multiphoton ionization[J]. Physical Review Letters, 71, 1994-1997(1993).

[23] Liu Y Q, Han M. Recent research advances in strong-field atomic tunneling ionization[J]. Acta Optica Sinica, 41, 0102001(2021).

[24] Castro A, Räsänen E, Rubio A et al. Femtosecond laser pulse shaping for enhanced ionization[J]. EPL (Europhysics Letters), 87, 053001(2009).

[25] Plenge J, Wirsing A, Wagner-Drebenstedt I et al. Coherent control of the ultrafast dissociative ionization dynamics of bromochloroalkanes[J]. Physical Chemistry Chemical Physics, 13, 8705-8714(2011).

[26] Shvetsov-Shilovski N I, Madsen L B, Räsänen E. Suppression of strong-field ionization by optimal pulse shaping: application to hydrogen and the hydrogen molecular ion[J]. Physical Review A, 91, 023425(2015).

[27] Bejot P, Karras G, Billard F et al. Harmonic generation and nonlinear propagation: when secondary radiations have primary consequences[J]. Physical Review Letters, 112, 203902(2014).

[28] Jang D, Schwartz R M, Woodbury D et al. Efficient terahertz and Brunel harmonic generation from air plasma via mid-infrared coherent control[J]. Optica, 6, 1338-1341(2019).

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

[30] Cousin S L, Silva F, Teichmann S et al. High-flux table-top soft X-ray source driven by sub-2-cycle, CEP stable, 1.85-μm 1-kHz pulses for carbon K-edge spectroscopy[J]. Optics Letters, 39, 5383-5386(2014).

[31] Liu L, Zhao S F, Li P C et al. Influence of relative carrier envelope phases on attosecond pulse generation from CO molecule exposed to a combined field of lasers[J]. Chinese Journal of Lasers, 40, 0902002(2013).

[32] Chini M, Wang X W, Cheng Y et al. Coherent phase-matched VUV generation by field-controlled bound states[J]. Nature Photonics, 8, 437-441(2014).

[33] Dubrouil A, Hort O, Catoire F et al. Spatio-spectral structures in high-order harmonic beams generated with Terawatt 10-fs pulses[J]. Nature Communications, 5, 4637(2014).

[34] Lewenstein M, Balcou P, Ivanov M Y et al. Theory of high-harmonic generation by low-frequency laser fields[J]. Physical Review A, 49, 2117-2132(1994).

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

[36] Tong X M, Zhao Z X, Lin C D. Theory of molecular tunneling ionization[J]. Physical Review A, 66, 033402(2002).

[37] Etches A, Madsen L B. Extending the strong-field approximation of high-order harmonic generation to polar molecules: gating mechanisms and extension of the harmonic cutoff[J]. Journal of Physics B: Atomic, Molecular and Optical Physics, 43, 155602(2010).

[38] Abu-Samha M, Madsen L B. Photoelectron angular distributions from polar molecules probed by intense femtosecond lasers[J]. Physical Review A, 82, 043413(2010).

[39] Bandrauk A. Nonadiabatic molecular high-order harmonic generation from polar molecules: spectral redshift[J]. Physical Review A, 83, 041403(2011).

[40] Li P C, Chu S I. 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]. Physical Review A, 86, 013411(2012).