Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy

Ionization dynamics in the light of elliptically polarized femtosecond laser pulses

Scientists of the MBI (IV Hertel, I. Shchatsinin, T. Laarmann, N. Zhavoronkov, H.-H. Ritze, and CP Schulz) have now shown that with elliptically polarized, ultra-short light pulses, a very clear insight into the dynamics of Ionization processes in intense laser fields can win. So you could prove on the football molecule C60 (Buckminsterfullerene) that for the replacement of one or more electrons from the molecule, a so-called "Tor state" is first excited. As a result, the molecule is so severely deformed by the laser field that many more electrons participate in this process, and some of them eventually leave the molecule - on a time scale of a few femtoseconds.
The work recently published in the prestigious journal Physical Review Letters (Phys. Rev. Lett. 102, 023003 (2009)) has also been included in the Virtual Journals on "Ultrafast Science" and "Nanoscale Science & Technology".

Fig. 1 Normalized ion yield (enlarged scale) as a function of β for C+60-2m 

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Publications since 2026

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A1-P-2026.01
Fragmentation dynamics of CS2 dications and trications following S 2p ionization

F. Allum, C.-S. Lam, B. Erk, H. Bromberger, P. H. Bucksbaum, M. Britton, M. Burt, N. Ekanayake, I. Gabalski, D. Garg, E. Gougoula, D. Heathcote, A. J. Howard, P. Hockett, D. M. P. Holland, S. Kumar, J. W. L. Lee, J. McManus, J. Mikosch, D. Milešević, R. S. Minns, C. C. Papadopoulou, C. Passow, W. O. Razmus, A. Röder, D. Rolles, A. Rouzée, M. S. Schuurman, A. Simao, A. Stolow, A.-T. Noor, J. Unwin, C. Vallance, T. Walmsley, M. Brouard, R. Forbes

 Journal of Chemical Physics 164 (2026) 024304/1-16

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A3-P-2025.28
Few-cycle pulses with 40 W average power at 100 kHz from a flat-top pumped OPCPA

H. Kassab, V. Fortin, M. Lavastre, L. Oppermann, G. Arisholm, T. Witting, M. J. J. Vrakking, S. Petit, F. J. Furch

 Optics Express 34 (2026)

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A3-P-2026.01
Apparatus for broadband, time-resolved measurements of laser-induced reflectivity transients with sub-10 fs resolution

H. M. Wrigge, T. Held, P. D. Ndione, T. Nagy, B. Rethfeld, P. Simon

Optics & Laser Technology 193, Part B (2026) 114354/1-8

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B1-P-2025.17
Excitation of spin waves in ferrimagnetic alloy via optical transient grating spectroscopy

M. Brioschi, P. Carrara, N. N. Khatu, N. Berndt, P. R. Miedaner, D. Dagur, G. Vinai, D. Engel, C. von Korff Schmising, S. Bonetti, K. A. Nelson, G. Panaccione, G. Rossi, A. A. Maznev, R. Cucini

 Advanced Photonics Research 7 (2026) e202500233/1-5

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B1-P-2025.18
Soft X-ray imaging with coherence tomography in the water window spectral range using highharmonic generation

J. Reinhard, F. Wiesner, M. Hennecke, T. Sidiropoulos, S. Kaleta, J. Späthe, J. J. Abel, M. Wünsche, G. Schmidl, J. Plentz, U. Hübner, K. Freiberg, J. Apell, S. Lippmann, M. Schnürer, S. Eisebitt, G. G. Paulus, S. Fuchs

 Light: Science & Applications 15 (2026) 79/1-10

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B4-P-2026.01
Studies on multiferroics with weak magnetoelectric coupling using Green's function method

P. Balasubramanian, M. Sharma, T. Nishanth, K. Vikram

Physical Review B 724 (2026) 418166/1-7

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C1-P-2025.03
Transient electronic polarizability of β-carotene from ultrafast terahertz Stark spectroscopy J. Zhang, C. Jaschke, B. P. Fingerhut, T. Elsaesser Journal of Physical Chemistry Letters Online (2026)

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C3-P-2025.04
Light wave induced nanosecond-long persistent state in the Dirac semimetal Cd3As2

A. Ghalgaoui, P. Pilch, T. Kang, M. Runge, S. Kovalev, Y. Yang, F. Xiu, Z. Wang

 Physical Review B 113 (2026) L041106/1-7

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T1-P-2026.01
Keldysh approach to calculating the ionization rate in strong two-color fields

V. Tamulienė, I. Babushkin

 Physical Review A 113 (2026) 013512/1-24

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T1-P-2026.02
Encoding and manipulating ultrafast coherent valleytronic information with lightwaves

F. Gucci, E. B. Molinero, M. Russo, P. San-Jose, F. V. A. Camargo, M. Maiuri, M. Y. Ivanov, Á. Jiménez-Galán, R. E. F. Silva, S. Dal Conte, G. Cerullo

 Nature Photonics online (2026) 1-10

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T2-P-2026.01
Geometry of chiral temporal structures. I. Physical effects

A. F. Ordonez, A. Roos, P. M. Maier, P. Decleva, D. Ayuso, O. Smirnova

 Physical Review A 113 (2026) 013110/1-

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T2-P-2026.02
Geometry of chiral temporal structures. II. The formalism A. Roos, P. M. Maier, A. F. Ordonez, O. Smirnova Physical Review A 113 (2026) 013111/1-8

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