High gas-pressure apparatus for nonlinear X-ray propagation and reshaping via stimulated X-ray Raman scattering

A. Magunia, M. Rebholz, T. Mazza, A. D. Fanis, T. M. Baumann, S. Usenko, N. Rennhack, K. Li, M. Simon, M. Agåker, J. Rubensson, M. Meyer, L. Young, C. Ott, and T. Pfeifer
Scientific Reports 15, 43874 (2025)

Visualizing the strong field–induced molecular breakup of C₆₀ via x- ray diffraction

K. Schnorr, S. Augustin, U. Saalmann, G. Schmid, A. Rouzée, R. Obaid, A. AlHaddad, N. Berrah, C. I. Blaga, C. Bostedt, M. Cardosa-Gutierrez, G. Carini, R. Coffee, L. F. DiMauro, P. Hart, Y. Ito, K. Kubicek, Y. Kumagai, J. Küpper, Y. H. Lai, H. Lindenblatt, R. A. Livingstone, S. Meister, R. Moshammer, K. Motomura, T. Möller, K. Nakahara, T. Osipov, G. Pandey, D. Ray, F. Remacle, D. Rolles, J. M. Rost, I. Schlichting, R. Schmidt, S. Techert, F. Trost, K. Ueda, J. Ullrich, M. J.. Vrakking, J. Zimmermann, C. P. Schulz, and T. Pfeifer
Science Advances 11, eadz1900 (2025)

Emergence of pseudoresonance in high-intensity resonant inelastic x-ray scattering

S. Son, T. M. Baumann, J. Pedersen, L. Budewig, K. Li, H. Ågren, O. Björneholm, R. Boll, J. Bozek, C. Caleman, S. Cardoch, L. M. Cornetta, A. De Fanis, E. De Santis, S. Dold, G. Doumy, U. Eichmann, X. Gong, J. Gråsjö, A. E. Green, I. Ismail, L. Kjellsson, E. Lindroth, T. Mazza, J. Montaño, T. Mullins, C. Ott, Y. Ovcharenko, T. Pfeifer, M. N. Piancastelli, R. Püttner, N. Rennhack, N. Rohringer, C. Sánchez-Hanke, C. Såthe, P. Schmidt, B. Senfftleben, M. Simon, N. Tîmneanu, M. Togawa, K. Ueda, S. Usenko, H. J. Wörner, W. Xu, Z. Yin, L. Young, J. Nordgren, M. Agåker, J. Söderström, S. Coriani, M. Meyer, ... and J. Rubensson
Physical Review A 112, L051101 (2025)

Two-dimensional spectral interferometry in the extreme-ultraviolet enabled by computational phase-stabilization

L. Hedewig, L. Hedewig, C. Kleine, F. Wieder, C. Ott, and T. Pfeifer
Optics Express 33, 48151, 48151-48159 (2025)

Super-resolution stimulated X-ray Raman spectroscopy

K. Li, C. Ott, M. Agåker, P. J. Ho, G. Doumy, A. Magunia, M. Rebholz, M. Simon, T. Mazza, A. D. Fanis, T. M. Baumann, J. Montano, N. Rennhack, S. Usenko, Y. Ovcharenko, K. Chordiya, L. Cheng, J. Rubensson, M. Meyer, T. Pfeifer, M. B. Gaarde, and L. Young
Nature 643, 662-668 (2025)
 MPIK press release: Super-resolution X-ray technique uncovers atomic structures
  Behind the Paper: Super-Resolution Stimulated X-ray Raman Spectroscopy
  Argonne National Laboratory: Super-resolution X-ray technique reveals atomic insights with unprecedented detail
  European XFEL: Für Superauflösung übertragen Forschende Nobelpreis-Idee auf Röntgenlicht
  European XFEL: 2014 Nobel Prize idea used to reach super-resolution
  ChemEurope.com: Super-resolution X-ray technique uncovers atomic structures
  ChemEurope.com: Röntgentechnik mit Superauflösung enthüllt atomare Strukturen
  pro-physik.de: Neuartige Röntgentechnik für Momentaufnahmen auf atomarer Ebene
  idw-online.de: Super-resolution X-ray technique uncovers atomic structures
  Nature News: Super-resolution spectroscopy with ‘spiky’ X-ray lasers
  idw-online.de: 2014 Nobel Prize idea used to reach super-resolution at European XFEL
  lightsources.org: 2014 Nobel Prize idea used to reach super-resolution
 Exzellenzcluster STRUCTURES: Breakthrough in X-ray Raman Spectroscopy Uncovers Atomic Structures

Phase evolution of strong-field ionization

L. Hutcheson, M. Hartmann, G. D. Borisova, P. Birk, S. Hu, C. Ott, T. Pfeifer, H. W. van der Hart, and A. C. Brown
Physical Review Research 7, L022074 (2025)

Bringing weak transitions to light

Y. He, X. Tong, S. Hu, G. D. Borisova, H. Liang, M. Hartmann, V. Stooß, C. Lyu, Z. Harman, C. H. Keitel, K. J. Schafer, M. B. Gaarde, C. Ott, and T. Pfeifer
Nature Communications 16, 5322 (2025)
 MPIK press release: Bringing weak transitions to light
 MPIK-Pressemitteilung: Schwache Übergänge ans Licht gebracht

State-resolved femtosecond phase control in dense-gas laser–atom interaction enabled by attosecond XUV interferometry

L. Hedewig, C. Kleine, Y. He, F. Wieder, C. Ott, and T. Pfeifer
Optics Letters 50, 3006-3009 (2025)

Resonant propagation of extreme-ultraviolet pulses through strongly driven high-density media

Y. He, S. Hu, G. D. Borisova, Y. Zhang, M. Rebholz, Z. Liu, M. B. Gaarde, C. Ott, and T. Pfeifer
Physical Review Research 7, 023064 (2025)

Formation of singly ionized oxygen atoms from O₂ driven by XUV pulses: A toolkit for the breakup of free-electron-laser-driven diatomics

M. Mountney, Z. Wang, S. Meister, F. Trost, H. Lindenblatt, A. Magunia, R. Moshammer, T. Pfeifer, and A. Emmanouilidou
Physical Review A 111, 013123 (2025)

Transmission spectroscopy of CF₄ molecules in intense x-ray fields

R. Jin, A. Fouda, A. Magunia, Y. Nam, M. Rebholz, A. D. Fanis, K. Li, G. Doumy, T. M. Baumann, M. Straub, S. Usenko, Y. Ovcharenko, T. Mazza, J. Montaño, M. Agåker, M. N. Piancastelli, M. Simon, J. Rubensson, M. Meyer, L. Young, C. Ott, and T. Pfeifer
Physical Review A 111, 012808 (2025)

Velocity-map imaging with counter-propagating laser pulses

T. Heldt, J. Oelmann, L. Guth, N. Lackmann, T. Pfeifer, and J. R. Crespo López-Urrutia
Optics Letters 49, 6825-6828 (2024)

Nanometric probing with a femtosecond, intra-cavity standing wave

T. V. Heldt, J. Oelmann, L. Guth, N. Lackmann, L. Matt, T. Pfeifer, and J. R. Crespo López-Urrutia
Nanophotonics 13, 4639-4646 (2024)

Laser-induced modification of an excited-state vibrational wave packet in neutral H₂ observed in a pump-control scheme

G. D. Borisova, P. Barber Belda, S. Hu, P. Birk, V. Stooss, M. Hartmann, D. Fan, R. Moshammer, A. Saenz, C. Ott, and T. Pfeifer
Physical Review Research 6, 033326 (2024)

Ultrafast artificial intelligence: machine learning with atomic-scale quantum systems

T. Pfeifer, M. Wollenhaupt, and M. Lein
New Journal of Physics 26, 093018 (2024)

Emission control of entangled electrons in photoionisation of a hydrogen molecule

F. Shobeiry, P. Fross, H. Srinivas, T. Pfeifer, A. Harth, and R. Moshammer
Scientific Reports 14, 19630 (2024)

Coherent control of multiphoton ionization of lithium atoms by a bichromatic laser field

S. Mežinska, A. Dorn, T. Pfeifer, and K. Bartschat
Physical Review A 110, 013116 (2024)

Closed-cycle noble gas recycling system for high-repetition rate high-harmonic generation

J.. Oelmann, L. Guth, T. Heldt, N. Griesbach, R. Hector, N. Lackmann, J. Nauta, T. Pfeifer, and J. R. Crespo López-Urrutia
Review of Scientific Instruments 95, 035115 (2024)

Electronic Population Reconstruction from Strong-Field-Modified Absorption Spectra with a Convolutional Neural Network

D. Richter, A. Magunia, M. Rebholz, C. Ott, and T. Pfeifer
Optics 5, 88-100 (2024)

Local enhancement in transient absorption spectroscopy by gating the resonance in the time domain

Y. He, C. Ott, T. Pfeifer, and M. B. Gaarde
Physical Review Research 6, 013103 (2024)

Resonant Perfect Absorption Yielded by Zero-Area Pulses

Y. He, Z. Liu, C. Ott, A. N. Pfeiffer, S. Sun, M. B. Gaarde, T. Pfeifer, and B. Hu
Physical Review Letters 129, 273201 (2022)

Core-resonance line-shape analysis of atoms undergoing strong-field ionization

M. Hartmann, L Hutcheson, G. D. Borisova, P. Birk, S Hu, A C Brown, H W van der Hart, C. Ott, and T. Pfeifer
Journal of Physics B: Atomic, Molecular and Optical Physics 55, 245601 (2022)

Differential Measurement of Electron Ejection after Two-Photon Two-Electron Excitation of Helium

M. Straub, T. Ding, M. Rebholz, G. D. Borisova, A. Magunia, H. C. Lindenblatt, S. Meister, F. Trost, Y. Wang, S. Palutke, M. Braune, S. Düsterer, R. Treusch, C. H. Greene, R. Moshammer, T. Pfeifer, and C. Ott
Physical Review Letters 129, 183204 (2022)

Laser Control of Electronic Exchange Interaction within a Molecule

P. Rupprecht, L. Aufleger, S. Heinze, A. Magunia, T. Ding, M. Rebholz, S. Amberg, N. Mollov, F. Henrich, M. W. Haverkort, C. Ott, and T. Pfeifer
Physical Review Letters 128, 153001 (2022)

Line-shape broadening of an autoionizing state in helium at high XUV intensity

L. Aufleger, P. Friebel, P. Rupprecht, A. Magunia, T. Ding, M. Rebholz, M. Hartmann, C. Ott, and T. Pfeifer
New Journal of Physics 24, 013014 (2022)

Laserlicht steuert Elektronen-Wechselwirkung

P. Rupprecht, C. Ott, T. Pfeifer, and M. W. Haverkort
Physik in unserer Zeit 53, 164-165 (2022)