[1] Pauling L. The nature of the chemical bond and the structure of molecules and crystals. Ithaca (New York): Cornell University Press; 1960.

[2] Mohn F, Gross L, Moll N, Meyer G. Imaging the charge distribution within a single molecule. Nat Nanotechnol. 2012;7:227.

[3] Cocker TL, Peller D, Yu P, Repp J, Huber R. Tracking the ultrafast motion of a single molecule by femtosecond orbital imaging. Nature. 2016;539(7628):263–267.

[4] Puschnig P, Berkebile S, Fleming AJ, Koller G, Emtsev K, Seyller T, Riley JD, Ambrosch-Draxl C, Netzer FP, Ramsey MG. Reconstruction of molecular orbital densities from photoemission data. Science. 2009;326(5953):702–706.

[5] Frietsch B, Carley R, Döbrich K, Gahl C, Teichmann M, Schwarzkopf O, Wernet P, Weinelt M. A high-order harmonic generation apparatus for time- and angle-resolved photoelectron spectroscopy. Rev Sci Instrum. 2013;84(7): Article 075106.

[6] Puschnig P, Reinisch EM, Ules T, Koller G, Soubatch S, Ostler M, Romaner L, Tautz FS, Ambrosch-Draxl C, Ramsey MG. Orbital tomography: Deconvoluting photoemission spectra of organic molecules. Phys Rev B. 2011;84: Article 235427.

[7] Meckel M, Comtois D, Zeidler D, Staudte A, Pavičić D, Bandulet HC, Pépin H, Kieffer JC, Dörner R, Villeneuve DM, et al. Laser-induced electron tunneling and diffraction. Science. 2008;320(5882):1478–1482.

[8] Kübel M, Dube Z, Naumov AY, Villeneuve DM, Corkum PB, Staudte A. Spatiotemporal imaging of valence electron motion. Nat Commun. 2019;10:1042.

[9] Murray R, Spanner M, Patchkovskii S, Ivanov MY. Tunnel ionization of molecules and orbital imaging. Phys Rev Lett. 2011;106(17): Article 173001.

[10] Wollenhaupt M, Engel V, Baumert T. Femtosecond laser photoelectron spectroscopy on atoms and small molecules: Prototype studies in quantum control. Annu Rev Phys Chem. 2005;56:25–56.

[11] Grasbon F, Paulus GG, Chin SL, Walther H, Muth-Böhm J, Becker A, Faisal FHM. Signatures of symmetry-induced quantum-interference effects observed in above-threshold ionization spectra of molecules. Phys Rev A. 2001;63:041402(R).

[12] Holmegaard L, Hansen JL, Kalhøj L, Louise Kragh S, Stapelfeldt H, Filsinger F, Küpper J, Meijer G, Dimitrovski D, Abu-samha M, et al. Photoelectron angular distributions from strong-field ionization of oriented molecules. Nat Phys. 2010;6:428–432.

[13] Keldysh LV. Ionization in the field of a strong electromagnetic wave. J Exp Theor Phys. 1965;47(5):1945.

[14] Becker W, Grasbon F, Kopold R, Milošević DB, Paulus GG, Walther H. Above-threshold ionization: From classical features to quantum effects. Adv At Mol Opt Phys. 2002;48:35–98.

[15] Akagi H, Otobe T, Staudte A, Shiner A, Turner F, Dörner R, Villeneuve DM, Corkum PB. Laser tunnel ionization from multiple orbitals in HCl. Science. 2009;325:1364–1367.

[16] Xie X. Two-dimensional attosecond electron wave-packet interferometry. Phys Rev Lett. 2015;114(17): Article 173003.

[17] Hückel E. Quantentheoretische beiträge zum benzolproblem. Z Physik. 1931;70:204–286.

[18] Lennard-Jones JE. The electronic structure of some diatomic molecules. Trans Faraday Soc. 1929;25:668–686.

[19] Poudel L, Steinmetz NF, French RH, Parsegian VA, Podgornik R, Ching W-Y. Implication of the solvent effect, metal ions and topology in the electronic structure and hydrogen bonding of human telomeric G-quadruplex DNA. Phys Chem Chem Phys. 2016;18(31):21573–21585.

[20] Itatani J, Levesque J, Zeidler D, Niikura H, Pépin H, Kieffer JC, Corkum PB, Villeneuve DM. Tomographic imaging of molecular orbitals. Nature. 2004;432:867–871.

[21] Haessler S, Caillat J, Boutu W, Giovanetti-Teixeira C, Ruchon T, Auguste T, Diveki Z, Breger P, Maquet A, Carré B, et al. Attosecond imaging of molecular electronic wave-packets. Nat Phys. 2010;6:200–206.

[22] Bertrand JB, Wörner HJ, Salières P, Villeneuve DM, Corkum PB. Linked attosecond phase interferometry for molecular frame measurements. Nat Phys. 2013;9:174–178.

[23] Puthumpally-Joseph R, Viau-Trudel J, Peters M, Nguyen-Dang TT, Atabek O, Charron E. Inversion of strong-field photoelectron spectra for molecular orbital imaging. Phys Rev A. 2016;94: Article 023421.

[24] He MR, Li Y, Zhou YM, Li M, Cao W, Lu PX. Direct visualization of valence electron motion using strong-field photoelectron holography. Phys Rev Lett. 2018;120(13): Article 133204.

[25] Dörner R, Mergel V, Jagutzki O, Spielberger L, Ullrich J, Moshammer R, Schmidt-Böcking H. Cold target recoil ion momentum spectroscopy: A ‘momentum microscope’ to view atomic collision dynamics. Phys Rep. 2000;330:95–192.

[26] Ullrich J, Moshammer R, Dorn A, Dörner R, Ph L, Schmidt H, Schmidt-Böcking H. Recoil-ion and electron momentum spectroscopy: Reaction-microscopes. Rep Prog Phys. 2003;66(9):1463.

[27] Wang YL, Xu SP, Quan W, Gong C, Lai XY, Hu SL, Liu MQ, Chen J, Liu XJ. Recoil-ion momentum distribution for nonsequential double ionization of Xe in intense midinfrared laser fields. Phys Rev A. 2016;94: Article 053412.

[28] Quan W, Hao XL, Hu XQ, Sun RP, Wang YL, Chen YJ, Yu SG, Xu SP, Xiao ZL, Lai XY, et al. laser-induced inelastic diffraction from strong-field double ionization. Phys Rev Lett. 2017;119(24): Article 243203.

[29] Sun RP, Lai XY, Yu SG, Wang YL, Xu SP, Quan W, Liu XJ. Tomographic extraction of the internuclear separation based on two-center interference with aligned diatomic molecules. Phys Rev Lett. 2019;122(19): Article 193202.

[30] Meckel M, Staudte A, Patchkovskii S, Villeneuve DM, Corkum PB, Dörner R, Spanner M. Signatures of the continuum electron phase in molecular strong-field photoelectron holography. Nat Phys. 2014;10:549–600.

[31] Dooley PW, Litvinyuk IV, Lee KF, Rayner DM, Spanner M, Villeneuve DM, Corkum PB. Direct imaging of rotational wave-packet dynamics of diatomic molecules. Phys Rev A. 2003;68: Article 023406.

[32] Pavičić D, Lee KF, Rayner DM, Corkum PB, Villeneuve DM. Direct measurement of the angular dependence of ionization for N2, O2, and CO2 in intense laser fields. Phys Rev Lett. 2007;98(24): Article 243001.

[33] Freeman RR, Bucksbaum PH, Milchberg H, Darack S, Schumacher D, Geusic ME. Above-threshold ionization with subpicosecond laser pulses. Phys Rev Lett. 1987;59:1092.

[34] Lai XY, Poli C, Schomerus H, Figueira de Morisson Faria C. Influence of the coulomb potential on above-threshold ionization: A quantum-orbit analysis beyond the strong-field approximation. Phys Rev A. 2015;92: Article 043407.

[35] Maxwell AS, Figueira de Morisson Faria C. It is all about phases: Ultrafast holographic photoelectron imaging. Rep Prog Phys. 2020;83: Article 034401.

[36] Maharjan CM, Alnaser AS, Litvinyuk I, Ranitovic P, Cocke CL. Wavelength dependence of momentum-space images of low-energy electrons generated by short intense laser pulses at high intensities. J Phys B. 2006;39(8):1955.

[37] Shvetsov-Shilovski NI, Lein M, Madsen LB, Räsänen E, Lemell C, Burgdörfer J, Arbó DG, Tőkési K. Semiclassical two-step model for strong-field ionization. Phys Rev A. 2016;94: Article 013415.

[38] Frisch MJ, Trucks GW, Schlegel HB, Scuseria GE, Robb MA, Cheeseman JR, Scalmani G, Barone V, Mennucci B, Petersson GA, et al. GAUSSIAN 09 (Revision D.01). Wallingford (CT): Gaussian Inc.; 2013.

[39] Petretti S, Vanne YV, Saenz A, Castro A, Decleva P. Alignment-dependent ionization of N2, O2, and CO2 in Intense Laser Fields. Phys Rev Lett. 2010;104(22): Article 223001.

[40] Busuladžić M, Gazibegović-Busuladžić A, Milošević DB, Becker W. Angle-resolved high-order above-threshold ionization of a molecule: Sensitive tool for molecular characterization. Phys Rev Lett. 2008;100(20): Article 203003.