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. Autoionization distribution of atomic high doubly excited states: A "breathing spheres" approach

    W. Huang, U. Eichmann, W. Sandner

     Physical Review A 59 (1999) 2744-2748
  2. Time-dependent screening in the photoionization of doubly excited two-electron systems

    C. Rosen, M. Dörr, U. Eichmann, W. Sandner

     Physical Review Letters 83 (1999) 4514-4517
  3. Laser cooling of metastable He atoms in an inhomogeneous electric field

    R. Schumann, C. Schubert, U. Eichmann, R. Jung, G. von Oppen

     Physical Review A 59 (1999) 2120-2125
  4. Complementarity and Young's interference fringes from two atoms

    W. M. Itano, J. C. Bergquist, J. J. Bollinger, D. J. Wineland, U. Eichmann, M. G. Raizen

     Physical Review A 57 (1998) 4176-4187
  5. Doubly excited 5s5p (3P1) np autoionizing Rydberg states of indium

    H. Maeda, U. Eichmann, W. Sandner

     Physical Review A 57 (1998) 3376-3380
  6. Collective multi-electron tunneling in state- and charge-selected atoms in strong fields

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

     Ultrafast Phenomena XI Springer Verlag (1998) 432-434
  7. All-diode laser cooling of single Ca+- ions

    G. Ritter, U. Eichmann

     Laser Spectroscopy, XIII International Conference, World Scientific Singapore (1998) 151-153
  8. All-diode laser cooling of single Ca+ ions

    G. Ritter, S.-M. Bae, U. Eichmann

     Applied Physics B 66 (1998) 609-612
  9. Two electron dynamics in the photoionization of highly excited three body Coulomb systems

    U. Eichmann, M. Seng, C. Rosen, W. Sandner

     Laser Spectroscopy, XIII International Conference, World Scientific, Singapore (1998) 393-395
  10. Microwave ionization of Rydberg states of the barium ion

    M. Seng, U. Eichmann, V. Lange, T. F. Gallagher, W. Sandner

     European Physical Journal D 3 (1998) 21-27