Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie im Forschungsverbund Berlin e.V.

MBI-Mitarbeiter - Persönliche Daten

Prof. Dr. Ulrich Eichmann

ulli.eichmann(at)mbi-berlin.de
+49 30 6392 1371

B2: Imaging and Coherent X-rays
Haus B, 2.14

Position

Member of Project 2.2 "Strong-field Few-body Systems"

Research

Our group's research focus is set on the investigation of atomic ionization dynamics in strong laser fields, where the laser intensities cover a range from 1014 W/cm2 to 1019 W/cm2. Earlier research highlights embrace results on simultaneous double tunneling, suppression of non-sequential ionization in relativistic laser fields, and core relaxation effects in relativistic laser fields. More recently, the focus of our investigations has shifted towards strong-field processes that lead to a) excited neutral atoms, b) neutral excited fragments after strong-field dissociation of molecules, and c) high survival rates of Rydberg atoms. Moreover, the survival of atoms in neutral excited states is accompanied by kinematic effects on neutral atoms in the focused laser beam, which we investigate using a direct imaging technique of excited atoms.

The figure shows the color-coded distribution of deflected (accelerated) neutral He atoms in a focused short-pulse laser beam with an intensity of 8x1015W/cm2.

MBI Publikationen

  1. Magneto-optical trapping of Stark-slowed metastable He atoms

    R. Jung, S. Gerlach, R. Schumann, G. von Oppen, U. Eichmann

     European Physical Journal D 23 (2003) 415-419
  2. Photoexcitation and ionization of cold metastable helium atoms

    R. Jung, S. Gerlach, G. von Oppen, U. Eichmann

     Interactions in ultracold gases: from atoms to molecules Wiley (2002) 394-398
  3. Was wiegt ein Elektron?

    U. Eichmann

     Physik Journal Februar 1 (2002) 16-17
  4. Relativistic laser-field-drift suppression of nonsequential multiple ionization

    M. Dammasch, M. Dörr, U. Eichmann, E. Lenz, W. Sandner

     Physical Review A 64 (2001) 061402/1-4
  5. Strong field double ionization of He-like systems: the case of In+ ions

    H. Maeda, M. Dammasch, U. Eichmann, W. Sandner

     Physical Review A 63 (2001) 025401/1-4
  6. Licht-Materie-Wechselwirkungen in fundamentalen quantenmechanischen Systemen

    U. Eichmann

     FB Physik Habilitation Technische Universität (2001)
  7. Multipole structures in the excitation process of high/doubly excited states

    W. Huang, C. Rosen, U. Eichmann, W. Sandner

     Physical Review A 61 (2000) 040502(R) 4 pages
  8. Strong-field multiple ionization of krypton

    H. Maeda, M. Dammasch, U. Eichmann, W. Sandner, A. Becker, F. H. M. Faisal

     Physical Review A 62 (2000) 035402 (4 pages)
  9. Collective multi-electron tunneling ionization in strong fields

    U. Eichmann, M. Dörr, H. Maeda, W. Becker, W. Sandner

     Physical Review Letters 84 (2000) 3550-3553
  10. Collective Multi-Electron Tunneling Ionization in Strong Fields

    U. Eichmann, M. Dörr, W. Becker, M. Dammasch, W. Sandner

     AIP Conf. Proc. - Multiphoton Processes 525 American Institute of Physics (2000) 199-210