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42. A.C. Kak, M. Slaney, Principles of Computerized Tomographic Imaging (IEEE Press, New
York, 1988)
43. J. Itatani, J. Levesque, D. Zeidler, H. Niikura, H. Pepin, J.C. Kieffer, P.B. Corkum, D.M.
Villeneuve, Tomographic imaging of molecular orbitals. Nature 432, 867–871 (2004)
44. K. Bergner, D. Flamm, M. Jenne, M. Kumkar, A. Tünnermann, S. Nolte, Time-resolved tomography of ultrafast laser-matter interaction. Opt. Express 26(3), 2873–2883 (2018)
45. M. Wollenhaupt, C. Lux, M. Krug, T. Baumert, Tomographic reconstruction of designer freeelectron wave packets. Chem. Phys. Chem. 14, 1341–1349 (2013)
46. C. Lux, M. Wollenhaupt, T. Bolze, Q. Liang, J. Köhler, C. Sarpe, T. Baumert, Circular dichroism
in the photoelectron angular distributions of camphor and fenchone from multiphoton ionization
with femtosecond laser pulses. Angew. Chem. Int. Ed. 51, 5001–5005 (2012)
47. C. Lux, M. Wollenhaupt, C. Sarpe, T. Baumert, Photoelectron circular dichroism of bicyclic
ketones from multiphoton ionization with femtosecond laser pulses. Chem. Phys. Chem. 16,
23 (2015)
48. C. Lux, A. Senftleben, C. Sarpe, M. Wollenhaupt, T. Baumert, Photoelectron circular dichroism
observed in the above-threshold ionization signal from chiral molecules with femtosecond laser
pulses. J. Phys. B 49(2), 02LT01 (2016)
49. S. Kerbstadt, L. Gabrisch, K. Eickhoff, T. Bayer, M. Wollenhaupt, Imaging multiple rydberg
wave packets from shaper-generated two-color femtosecond pump-probe sequences. Phys. Rev.
A 99, 013406 (2019)
50. D. Pengel, S. Kerbstadt, L. Englert, T. Bayer, M. Wollenhaupt, Control of three-dimensional
electron vortices from femtosecond multiphoton ionization. Phys. Rev. A 96, 043426 (2017)
51. T. Bayer, D. Gräfing, S. Kerbstadt, D. Pengel, K. Eickhoff, L. Englert, M. Wollenhaupt, Timeresolved 3d imaging of ultrafast spin-orbit wave packet dynamics. New J. Phys. 21(3), 033001
(2019)
52. H.A. Bethe, E.E. Salpeter, Quantum Mechanics of One- and Two-Electron Atoms (Springer,
Berlin, 1957)
53. A.S. Alnaser, I.V. Litvinyuk, Subfemtosecond directional control of chemical processes in
molecules. J. Phys. B 50(3), 032002 (2017)
54. M.F. Kling, J. Rauschenberger, A.J. Verhoef, E. Hasovic, T. Uphues, D.B. Milosevic, H.G.
Muller, M.J.J. Vrakking, Imaging of carrier-envelope phase effects in above-threshold ionization with intense few-cycle laser fields. New J. Phys. 10, 025024–025024-17 (2008)
55. D. Zille, D. Adolph, M. Möller, A.M. Sayler, G.G. Paulus, Chirp and carrier-envelope-phase
effects in the multiphoton regime: measurements and analytical modeling of strong-field ionization of sodium. New J. Phys. 20(6), 063018 (2018)
56. F. Ehlotzky, Atomic phenomena in bichromatic laser fields. Phys. Rep. 345(4), 176–264 (2001)
57. M.J. Abel, T. Pfeifer, A. Jullien, P.M. Nagel, M.J. Bell, D.M. Neumark, S.R. Leone, Carrierenvelope phase-dependent quantum interferences in multiphoton ionization. J. Phys. B 42(7),
075601 (2009)
58. A. Wituschek, J. von Vangerow, J. Grzesiak, F. Stienkemeier, M. Mudrich, A simple photoionization scheme for characterizing electron and ion spectrometers. Rev. Sci. Instrum. 87(8),
083105 (2016)
59. J.M. Ngoko Djiokap, S.X. Hu, L.B. Madsen, N.L. Manakov, A.V. Meremianin, A.F. Starace,
Electron vortices in photoionization by circularly polarized attosecond pulses. Phys. Rev. Lett.
115(11), 113004 (2015)
60. I. Bialynicki-Birula, Z. Bialynicka-Birula, C. Sliwa, Motion of vortex lines in quantum mechanics. Phys. Rev. A 61(3), 032110 (2000)
61. J.H. Macek, J.B. Sternberg, S.Y. Ovchinnikov, T.G. Lee, D.R. Schultz, Origin, evolution, and
imaging of vortices in atomic processes. Phys. Rev. Lett. 102(14), 143201 (2009)
62. E. Madelung, Quantentheorie in hydrodynamischer form. Z. Phys. 40(3), 322–326 (1927)
63. L.P.H. Schmidt, C. Goihl, D. Metz, H. Schmidt-Bocking, R. Dörner, S.Y. Ovchinnikov, J.H.
Macek, D.R. Schultz, Vortices associated with the wave function of a single electron emitted
in slow ion-atom collisions. Phys. Rev. Lett. 112(8), 083201 (2014)
S. Kerbstadt et al.
41. C. Smeenk, L. Arissian, A. Staude, D.M. Villeneuve, P.B. Corkum, Momentum space tomographic imaging of photoelectrons. J. Phys. B 42, 185402 (2009)
42. A.C. Kak, M. Slaney, Principles of Computerized Tomographic Imaging (IEEE Press, New
York, 1988)
43. J. Itatani, J. Levesque, D. Zeidler, H. Niikura, H. Pepin, J.C. Kieffer, P.B. Corkum, D.M.
Villeneuve, Tomographic imaging of molecular orbitals. Nature 432, 867–871 (2004)
44. K. Bergner, D. Flamm, M. Jenne, M. Kumkar, A. Tünnermann, S. Nolte, Time-resolved tomography of ultrafast laser-matter interaction. Opt. Express 26(3), 2873–2883 (2018)
45. M. Wollenhaupt, C. Lux, M. Krug, T. Baumert, Tomographic reconstruction of designer freeelectron wave packets. Chem. Phys. Chem. 14, 1341–1349 (2013)
46. C. Lux, M. Wollenhaupt, T. Bolze, Q. Liang, J. Köhler, C. Sarpe, T. Baumert, Circular dichroism
in the photoelectron angular distributions of camphor and fenchone from multiphoton ionization
with femtosecond laser pulses. Angew. Chem. Int. Ed. 51, 5001–5005 (2012)
47. C. Lux, M. Wollenhaupt, C. Sarpe, T. Baumert, Photoelectron circular dichroism of bicyclic
ketones from multiphoton ionization with femtosecond laser pulses. Chem. Phys. Chem. 16,
23 (2015)
48. C. Lux, A. Senftleben, C. Sarpe, M. Wollenhaupt, T. Baumert, Photoelectron circular dichroism
observed in the above-threshold ionization signal from chiral molecules with femtosecond laser
pulses. J. Phys. B 49(2), 02LT01 (2016)
49. S. Kerbstadt, L. Gabrisch, K. Eickhoff, T. Bayer, M. Wollenhaupt, Imaging multiple rydberg
wave packets from shaper-generated two-color femtosecond pump-probe sequences. Phys. Rev.
A 99, 013406 (2019)
50. D. Pengel, S. Kerbstadt, L. Englert, T. Bayer, M. Wollenhaupt, Control of three-dimensional
electron vortices from femtosecond multiphoton ionization. Phys. Rev. A 96, 043426 (2017)
51. T. Bayer, D. Gräfing, S. Kerbstadt, D. Pengel, K. Eickhoff, L. Englert, M. Wollenhaupt, Timeresolved 3d imaging of ultrafast spin-orbit wave packet dynamics. New J. Phys. 21(3), 033001
(2019)
52. H.A. Bethe, E.E. Salpeter, Quantum Mechanics of One- and Two-Electron Atoms (Springer,
Berlin, 1957)
53. A.S. Alnaser, I.V. Litvinyuk, Subfemtosecond directional control of chemical processes in
molecules. J. Phys. B 50(3), 032002 (2017)
54. M.F. Kling, J. Rauschenberger, A.J. Verhoef, E. Hasovic, T. Uphues, D.B. Milosevic, H.G.
Muller, M.J.J. Vrakking, Imaging of carrier-envelope phase effects in above-threshold ionization with intense few-cycle laser fields. New J. Phys. 10, 025024–025024-17 (2008)
55. D. Zille, D. Adolph, M. Möller, A.M. Sayler, G.G. Paulus, Chirp and carrier-envelope-phase
effects in the multiphoton regime: measurements and analytical modeling of strong-field ionization of sodium. New J. Phys. 20(6), 063018 (2018)
56. F. Ehlotzky, Atomic phenomena in bichromatic laser fields. Phys. Rep. 345(4), 176–264 (2001)
57. M.J. Abel, T. Pfeifer, A. Jullien, P.M. Nagel, M.J. Bell, D.M. Neumark, S.R. Leone, Carrierenvelope phase-dependent quantum interferences in multiphoton ionization. J. Phys. B 42(7),
075601 (2009)
58. A. Wituschek, J. von Vangerow, J. Grzesiak, F. Stienkemeier, M. Mudrich, A simple photoionization scheme for characterizing electron and ion spectrometers. Rev. Sci. Instrum. 87(8),
083105 (2016)
59. J.M. Ngoko Djiokap, S.X. Hu, L.B. Madsen, N.L. Manakov, A.V. Meremianin, A.F. Starace,
Electron vortices in photoionization by circularly polarized attosecond pulses. Phys. Rev. Lett.
115(11), 113004 (2015)
60. I. Bialynicki-Birula, Z. Bialynicka-Birula, C. Sliwa, Motion of vortex lines in quantum mechanics. Phys. Rev. A 61(3), 032110 (2000)
61. J.H. Macek, J.B. Sternberg, S.Y. Ovchinnikov, T.G. Lee, D.R. Schultz, Origin, evolution, and
imaging of vortices in atomic processes. Phys. Rev. Lett. 102(14), 143201 (2009)
62. E. Madelung, Quantentheorie in hydrodynamischer form. Z. Phys. 40(3), 322–326 (1927)
63. L.P.H. Schmidt, C. Goihl, D. Metz, H. Schmidt-Bocking, R. Dörner, S.Y. Ovchinnikov, J.H.
Macek, D.R. Schultz, Vortices associated with the wave function of a single electron emitted
in slow ion-atom collisions. Phys. Rev. Lett. 112(8), 083201 (2014)