Ara es mostren els items 16-34 de 34

    • Molecular Fine Structure from Water Window X-rays 

      Cousin, Seth L.; Silva, Francisco; Teichmann, Stephan; Hemmer, M.; Biegert, Jens (OSA, 2014-12-01)
      Article
      Accés obert
    • Molecular structure retrieval directly from laboratory-frame photoelectron spectra in laser-induced electron diffraction 

      Sánchez, Aurelien; Amini, Kasra; Belsa Carné, Blanca Maria; Liu, Xinyao; Steinle, Tobias; Biegert, Jens (2021-03-09)
      Article
      Accés obert
      Ubiquitous to most molecular scattering methods is the challenge to retrieve bond distance and angle from the scattering signals since this requires convergence of pattern matching algorithms or fitting methods. This ...
    • Molecular structure retrieval directly from laboratory-frame photoelectron spectra in laser-induced electron diffraction 

      Sánchez, A.; Amini, K.; Wang, S.-J.; Steinle, T.; Belsa, B.; Danek, J.; Le, A. T.; Liu, X.; Moshammer, R.; Pfeifer, T.; Richter, M.; Ullrich, J.; Gräfe, S.; Lin, C. D.; Biegert, Jens (Nature Research, 2021-03-09)
      Article
      Accés obert
      Ubiquitous to most molecular scattering methods is the challenge to retrieve bond distance and angle from the scattering signals since this requires convergence of pattern matching algorithms or fitting methods. This ...
    • Performance of MgO:PPLN, KTA, and KNbO3 for mid-wave infrared broadband parametric amplification at high average power 

      Baudisch, M.; Hemmer, M.; Pires, H.; Biegert, Jens (OSA, 2014-10-15)
      Article
      Accés obert
      The performance of KNbO3, MgO:PPLN and KTA were experimentally compared for broadband mid-wave infrared parametric amplification at high repetition rate. The seed pulses with an energy of 6.5 μJ were amplified using 410 ...
    • 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 ...