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. Strong laser field fragmentation of H2: Coulomb explosion without double ionization

    B. Manschwetus, T. Nubbemeyer, K. Gorling, G. Steinmeyer, U. Eichmann, H. Rottke, W. Sandner

     Physical Review Letters 102 (2009) 113002/1-4
  2. Excited neutral atomic fragments in the strong-field dissociation of N2 molecules

    T. Nubbemeyer, U. Eichmann, W. Sandner

     Journal of Physics B-Atomic, Molecular and Optical Physics 42 (2009) 134010/1-5
  3. Acceleration of neutral atoms in strong short-pulse laser fields

    U. Eichmann, T. Nubbemeyer, H. Rottke, W. Sandner

     Nature 461 (2009) 1261-1264
  4. Strong-field tunneling without ionization

    T. Nubbemeyer, K. Gorling, A. Saenz, U. Eichmann, W. Sandner

     Physical Review Letters 101 (2008) 233001/1-4
  5. Sympathetic cooling of laser-produced doubly charged ions in a few-ion crystal

    T. Kwapien, U. Eichmann, W. Sandner

     Physical Review A 75 (2007) 063418/1-6
  6. Multiple ionization of Kr in an intense circularly polarized laser field

    E. Gubbini, U. Eichmann, M. Kalashnikov, W. Sandner

     Journal of Physics B-Atomic, Molecular and Optical Physics 39 (2006) S381-387
  7. Reply: fano line shapes reconsidered: symmetric photoionization peaks from pure continuum excitation

    U. Eichmann, T. F. Gallagher, R. M. Konik

     Physical Review Letters 94 (2005) 229302
  8. Core Relaxation in Atomic Ultra Strong Laser Field Ionization

    E. Gubbini, U. Eichmann, M. Kalashnikov, W. Sandner

     Physical Review Letters 94 (2005) 053602/1-4
  9. Strong laser field ionization of Kr: first-order relativistic effects defeat rescattering

    E. Gubbini, U. Eichmann, M.-P. Kalashnikov, W. Sandner

     Journal of Physics B-Atomic, Molecular and Optical Physics 38 (2005) L87-93
  10. "On-line" cleaning of optical components in a multi TW-Ti:Sa laser system

    E. Gubbini, G. Kommol, M. Schnürer, H. Schönnagel, U. Eichmann, M. P. Kalashnikov, P.V. Nickles, F. Eggenstein, G. Reichardt, W. Sandner

     Vacuum 76 (2004) 45-49