[1] Weber T, Weckenbrock M, Staudte A. et al. Recoil-ion momentum distributions for single and double ionization of helium in strong laser fields[J]. Physical Review Letters, 84, 443-446(2000).
[2] Liu X, Rottke H, Eremina E et al. Nonsequential double ionization at the single-optical-cycle limit[J]. Physical Review Letters, 93, 263001(2004). http://europepmc.org/abstract/MED/15697974
[3] Eremina E, Liu X, Rottke H et al. Influence of molecular structure on double ionization of N2 and O2 by high intensity ultrashort laser pulses[J]. Physical Review Letters, 92, 173001(2004).
[4] Wang X, Eberly J H. Classical theory of high-field atomic ionization using elliptical polarization[J]. Physical Review A, 86, 013421(2012). http://arxiv.org/abs/1203.4824v1
[5] Rudenko A, Zrost K, Schröter C D et al. Resonant structures in the low-energy electron continuum for single ionization of atoms in the tunnelling regime[J]. Journal of Physics B: Atomic, Molecular and Optical Physics, 37, L407-L413(2004).
[6] Agostini P, Fabre F, Mainfray G et al. Free-free transitions following six-photon ionization of xenon atoms[J]. Physical Review Letters, 42, 1127-1130(1979). http://www.nrcresearchpress.com/servlet/linkout?suffix=refg5/ref5&dbid=16&doi=10.1139%2Fcjp-2013-0389&key=10.1103%2FPhysRevLett.42.1127
[7] Zeng Z N, Li R X, Yu W et al. Effect of the carrier-envelope phase of the driving laser field on the high-order harmonic attosecond pulse[J]. Physical Review A, 67, 013815(2003).
[8] Goreslavskii S P, Popruzhenko S V, Kopold R et al. Electron-electron correlation in laser-induced nonsequential double ionization[J]. Physical Review A, 64, 053402(2001).
[9] Liu X. Electron-electron correlation in strong laser fields[J]. Journal of Modern Optics, 58, 1076-1131(2011). http://www.tandfonline.com/doi/full/10.1080/09500340.2010.543958
[10] Fittinghoff D N, Bolton P R, Chang B et al. Observation of nonsequential double ionization of helium with optical tunneling[J]. Physical Review Letters, 69, 2642-2645(1992). http://europepmc.org/abstract/MED/10046547
[11] Bauer D. Two-dimensional, two-electron model atom in a laser pulse: Exact treatment, single-active-electron analysis, time-dependent density-functional theory, classical calculations, and nonsequential ionization[J]. Physical Review A, 56, 3028-3039(1997).
[12] Chen J, Liu J, Fu L B et al. Interpretation of momentum distribution of recoil ions from laser-induced nonsequential double ionization by semiclassical rescattering model[J]. Physical Review A, 63, 011404(2000).
[13] Panfili R, Haan S L, Eberly J H. Slow-down collisions and nonsequential double ionization in classical simulations[J]. Physical Review Letters, 89, 113001(2002). http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=VIRT05000001000004000094000001&idtype=cvips&gifs=Yes
[14] Alnaser A S, Osipov T, Benis E P et al. Rescattering double ionization of D2 and H2 by intense laser pulses[J]. Physical Review Letters, 91, 163002(2003). http://www.ncbi.nlm.nih.gov/pubmed/14611400
[15] Feuerstein B, Moshammer R, Fischer D et al. Separation of recollision mechanisms in nonsequential strong field double ionization of Ar: The role of excitation tunneling[J]. Physical Review Letters, 87, 043003(2001).
[16] Staudte A, Ruiz C, Schöffler M et al. Binary and recoil collisions in strong field double ionization of helium[J]. Physical Review Letters, 99, 263002(2007). http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRLTAO000099000026263002000001&idtype=cvips&gifs=Yes
[17] Ye D F, Liu X, Liu J. Classical trajectory diagnosis of a fingerlike pattern in the correlated electron momentum distribution in strong field double ionization of helium[J]. Physical Review Letters, 101, 233003(2008).
[18] Huang C, Zhou Y M, Zhang Q B et al. Contribution of recollision ionization to the cross-shaped structure in nonsequential double ionization[J]. Optics Express, 21, 11382-11390(2013).
[19] Zhang Z L, Zhang J T, Bai L H et al. Transition of correlated-electron emission in nonsequential double ionization of Ar atoms[J]. Optics Express, 23, 7044-7052(2015). http://europepmc.org/abstract/MED/25837049
[20] Wang S W, Zheng J, Xue L et al. Phase-modulation-combination method for generation of high repetition short pulses[J]. Acta Optica Sinica, 33, 0614001(2013).
[21] Liu Q S, Cen Z F, Li X T et al. Spatial-temporal-property analysis of ultrashort pulse propagating through real optical system[J]. Acta Optica Sinica, 33, 0132001(2013).
[22] Dong S S, Chen X, Zhang J T et al. Pulse-duration effect in nonsequential double ionization of Ar atoms[J]. Physical Review A, 93, 053410(2016). http://adsabs.harvard.edu/abs/2016PhRvA..93e3410D
[23] Li H Y, Chen J, Jiang H B et al. Carrier-envelope phase dependence of non-sequential double ionization in few-cycle pulses[J]. Optics Express, 16, 20562-20570(2008). http://www.ncbi.nlm.nih.gov/pubmed/19065194
[24] Bergues B, Kuel M, Johnson N G et al. Attosecond tracing of correlated electron-emission in non-sequential double ionization[J]. Nature Communications, 3, 813(2012).
[25] Liu Y, Tschuch S, Rudenko A et al. Strong-field double ionization of Ar below the recollision threshold[J]. Physical Review Letters, 101, 053001(2008). http://www.ncbi.nlm.nih.gov/pubmed/18764387
[26] Panfili R, Eberly J H, Haan S L. Comparing classical and quantum dynamics of strong-field double ionization[J]. Optics Express, 8, 431-435(2001). http://www.opticsinfobase.org/abstract.cfm?uri=oe-8-7-431
[27] Ho P J, Panfili R, Haan S L et al. Nonsequential double ionization as a completely classical photoelectric effect[J]. Physical Review Letters, 94, 093002(2005). http://www.ncbi.nlm.nih.gov/pubmed/15783962?dopt=Abstract
[28] Zhou Y M, Liao Q, Lu P X. Asymmetric electron energy sharing in strong-field double ionization of helium[J]. Physical Review A, 82, 053402(2010). http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=VIRT05000009000012000131000001&idtype=cvips&gifs=Yes
[29] Xin G G, Ye D F, Zhao Q et al. The role of multi-return induced collision-ionization in atomic nonsequential double ionization[J]. Acta Physica Sinica, 60, 093204(2011).
[30] Haan S L, Breen L, Karim A et al. Variable time lag and backward ejection in full-dimensional analysis of strong-field double ionization[J]. Physical Review Letters, 97, 103008(2006).
[31] Zhang Z L, Bai L H, Zhang J T. Double ionization of Ar below the recollision threshold intensity[J]. Physical Review A, 90, 023410(2014). http://journals.aps.org/pra/accepted/76070Nd9Gb61a21841b90dc62b02156d387a2612a