Ara es mostren els items 20-34 de 34

    • Realizing attosecond core-level X-ray spectroscopy for the investigation of condensed matter and for material science 

      Summers, A.; Severino, Stefano; Reduzzi, Maurizio; Sidiropoulos, Themistoklis P. H.; Rivas, Daniel E.; Palo, Nicola di; Sun, Hung-wei; Chien, Ying-hao; León, Iker; Buades, Barbara; Cousin, S.; Teichmann, Stephan M.; Mey, Tobias; Toomey, Tim; Efetov, Dmitri K.; Biegert, Jens (American Association for the Advancement of Science (AAAS), 2023-01)
      Article
      Accés obert
      Unraveling the exact nature of nonequilibrium and correlated interactions is paramount for continued progress in many areas of condensed matter science. Such insight is a prerequisite to develop an engineered approach for ...
    • Role of high ponderomotive energy in laser-induced nonsequential double ionization 

      Shaaran, T.; Camus, N.; Dura, J.; Fechner, L.; Thai, A.; Britz, A.; Baudisch, M.; Steinle, T.; Senftleben, A.; Schröter, C. D.; Ullrich, J.; Pfeifer, T.; Keitel, C. H.; Biegert, Jens; Hatsagortsyan, K. Z.; Moshammer, R. (APS, 2019-02-19)
      Article
      Accés obert
      The laser-induced nonsequential double ionization (NSDI) of rare gas atoms in the near and mid-IR laser fields is studied experimentally and theoretically. We investigate electron-electron correlation at high recollision ...
    • Seven-octave high-brightness and carrier-envelope-phase-stable light source 

      Elu Etxano, Ugaitz; Maidment, Luke; Vamos, Lenard; Badikov, Valeriy; Badikov, Dmitrii; Petrov, Valentin; Biegert, Jens (2021-04)
      Article
      Accés restringit per política de l'editorial
      High-brightness sources of coherent and few-cycle-duration light waveforms with spectral coverage from the ultraviolet to the terahertz would offer unprecedented versatility and opportunities for a wide range of applications ...
    • Spatiotemporal isolation of attosecond soft X-ray pulses in the water window 

      Silva, Francisco; Teichmann, Stephan M.; Cousin, Seth L.; Hemmer, Michael; Biegert, Jens (Nature Publishing group, 2015-03-19)
      Article
      Accés obert
      Attosecond pulses at photon energies that cover the principal absorption edges of the building blocks of materials are a prerequisite for time-resolved probing of the triggering events leading to electronic dynamics such ...
    • Strong-Field Physics with Mid-IR Fields 

      Wolter, Benjamin; Pullen, Michael G.; Baudisch, Matthias; Sclafani, Michele; Hemmer, Michaël; Senftleben, Arne; Schröter, Claus Dieter; Ullrich, Joachim; Moshammer, Robert; Biegert, Jens (APS, 2015-06-26)
      Article
      Accés obert
      Strong-field physics is currently experiencing a shift towards the use of mid-IR driving wavelengths. This is because they permit conducting experiments unambiguously in the quasistatic regime and enable exploiting the ...
    • Strong-field plasmonic photoemission in the mid-IR at <1 GW/cm2 intensity 

      Teichmann, S. M.; Rácz, P.; Ciappina, M. F.; Pérez-Hernández, J. A.; Thai, A.; Fekete, J.; Elezzabi, A. Y.; Veisz, L.; Biegert, Jens; Dombi, P. (Nature Publishing group, 2015-01-12)
      Article
      Accés obert
      We investigated nonlinear photoemission from plasmonic films with femtosecond, mid-infrared pulses at 3.1 mm wavelength. Transition between regimes of multi-photon-induced and tunneling emission is demonstrated at an ...
    • Sub-4-optical-cycle, 340 MW peak power, high stability mid-IR source at 160 kHz 

      Baudisch, M.; Pires, H.; Ishizuki, H.; Taira, T.; Hemmer, M.; Biegert, Jens (IOP, 2015-09-03)
      Article
      Accés restringit per política de l'editorial
      We present the state of the art of our development of a unique high average power mid-infrared (IR) optical parametric chirped pulse amplification (OPCPA) source. The system delivers passively carrier-envelope phase ...
    • Symphony on strong field approximation 

      Amini, Kasra; Biegert, Jens; Calegari, Francesca; Chacón, Alexis; Ciappina, Marcelo F.; Dauphin, Alexandre; Efimov, Dmitry K.; Figueira de Morisson Faria, Carla; Giergiel, Krzysztof; Gniewek, Piotr; Landsman, Alexandra S.; Lesiuk, Michał; Mandrysz, Michał; Maxwell, Andrew S.; Moszynski, Robert; Ortmann, Lisa; Pérez-Hernández, Jose Antonio; Picón, Antonio; Pisanty, Emilio; Prauzner-Bechcicki, Jakub; Sacha, Krzysztof; Suárez, Noslen; Zaïr, Amelle; Zakrzewski, Jakub; Lewenstein, Maciej (IOP, 2019-10-14)
      Article
      Accés obert
      This paper has been prepared by the Symphony collaboration (University of Warsaw, Uniwersytet Jagielloński, DESY/CNR and ICFO) on the occasion of the 25th anniversary of the ‘simple man’s models’ which underlie most of ...
    • Three-wave mixing mediated femtosecond pulse compression in BBO 

      Grün, A.; Austin, Dane R.; Cousin, Seth L.; Biegert, Jens (OSA, 2015-10-15)
      Article
      Accés obert
      Nonlinear pulse compression mediated by three-wave mixing is demonstrated for ultrashort Ti:sapphire pulses in a type II phase-matched 𝛽�β-barium borate (BBO) crystal using noncollinear geometry. 170 μJ pulses at 800 nm ...
    • Transient Attosecond Soft-X-Ray Spectroscopy in Layered Semi-Metals 

      Sidiropolous, T. P.H.; Di Palo, N.; Rivas, D. E.; Severino, S.; Reduzzi, M.; Buades, B.; Leon, I.; Cousin, S. L.; Hemmer, M.; Cocchi, C.; Pellegrin, E.; Herrero Martin, J.; Mañas-Valero, S.; Coronado, E.; Danz, T.; Draxi, C.; Uemoto, M.; Yabana, K.; Schultze, Martin; Wall, Simon; Picon, A.; Biegert, Jens (SPIE, 2020)
      Comunicació de congrés
      Accés obert
      X-ray absorption fine-structure (XAFS) spectroscopy is a well-established technique capable of extracting information about a material’s electronic and lattice structure with atomic resolution. While the near-edge region ...
    • Ultrafast electron diffraction imaging of bond breaking in di-ionized acetylene 

      Wolter, B.; Pullen, M. G.; Le, A.-T.; Baudisch, M.; Doblhoff-Dier, K.; Senftleben, A.; Hemmer, M.; Schröter, C. D.; Ullrich, J.; Pfeifer, T.; Moshammer, R.; Gräfe, S.; Vendrell, O.; Lin, C. D.; Biegert, Jens (Science, 2016-10-16)
      Article
      Accés obert
      Visualizing chemical reactions as they occur requires atomic spatial and femtosecond temporal resolution. Here, we report imaging of the molecular structure of acetylene (C2H2) 9 femtoseconds after ionization. Using ...
    • Ultrafast imaging of the Renner-Teller effect in a field-dressed molecule 

      Amini, Kasra; Sclafani, Michele; Steinle, Tobias; Moniruzzaman, Shaikh; Sánchez, Aurelien; Liu, Xinyao; Anh-Thu, Le; Steinmetzer, Johannes; Pfeiffer, Thomas; Moshammer, Robert; Ullrich, Joachim; Lewenstein, Maciej; Moszynski, Robert; García de Abajo, Francisco Javier; Lin, Chii-Dong; Gräfe, Stefanie; Biegert, Jens (Institute of Physics (IOP), 2020-01-01)
      Article
      Accés obert
      We present experimental results of linear-to-bent transition of field-dressed molecules, mediated by Renner-Teller effect. Using the state-of-the-art laser-induced electron diffraction (LIED) technique, we image a bent and ...
    • Ultrafast nonlinear optical response of Dirac fermions in graphene 

      Baudisch, Matthias; Marini, Andrea; Cox, Joel D.; Zhu, Tony; Silva, Francisco; Teichmann, Stephan; Massicotte, Mathieu; Koppens, Frank H. L.; Levitov, Leonid S.; García de Abajo, Francisco Javier; Biegert, Jens (Nature, 2018-03-09)
      Article
      Accés obert
      The speed of solid-state electronic devices, determined by the temporal dynamics of charge carriers, could potentially reach unprecedented petahertz frequencies through direct manipulation by optical fields, consisting ...
    • Ultrashort pulse generation in the mid-IR 

      Pires, H.; Baudisch, M.; Sanchez, D.; Hemmer, M.; Biegert, Jens (Elsevier, 2015-09-01)
      Article
      Accés obert
      Recent developments in laser sources operating in the mid-IR (3–8μm) have been motivated by the numerous possibilities for both fundamental and applied research. One example is the ability to unambiguously detect pollutants ...
    • Ultrashort pulse generation in the mid-IR 

      Pires, H.; Baudisch, H.; Sanchez, D.; Hemmer, M.; Biegert, Jens (Science Direct, 2015-09-01)
      Article
      Accés restringit per política de l'editorial
      Recent developments in laser sources operating in the mid-IR (View the MathML source) have been motivated by the numerous possibilities for both fundamental and applied research. One example is the ability to unambiguously ...