MBI staff member
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Dr. Horst Rottke

rottke@mbi-berlin.de

+49 30 6392 1370

Department Head: B2 "Few Particle Systems in Strong Laser Fields"

Project Coordinator: 2.2 "Strong-field Few-body Systems"

 

Research Topic


Short introduction:


We are investigating the dynamics of strong field interaction with atoms, molecules and ordered, loosely bound atomic or molecular structures, where the constituents still show their individual characteristics. These loosely bound structures are usually found in the form of small van der Waals clusters, however, also molecules assume this characteristic during dissociation at large internuclear separation. Characteristic of these systems are closely spaced electronic states at a large internuclear separation where the electrons start to localize at the individual constituents.

Besides strong field phenomena we are interested in electron dynamics in the bound part of the atomic spectrum and in the ionization continuum of atoms either in energy ranges structured by Fano resonances or in the unstructured continuum.


The main instruments employed in these investigations are

  • laser systems delivering high intensity pulses with pulse widths in the femtosecond range
  • a source for generation of high order harmonics of this laser radiation
  • a reaction microscope (see the Fig.) capable to determine the momentum of any charged particle emerging from the interaction of the laser pulses with the respective target in a correlated way


  • More details on recent activities can be found here.

    Curriculum vitae

  • 10/1975 – 7/1982 Study of Physics, Univ. Bielefeld
  • Diploma thesis: "Stepwise photoionization of molecules and of atomic hydrogen with mass selective ion detection"
  • 8/1982 – 10/1986 Research assistant, Phys. Dep., Univ. Bielefeld, Prof. Dr. K. H. Welge
  • PhD thesis: "Laser spectroscopy on highly excited Rydberg states of atomic and molecular hydrogen"
  • 11/1986 – 2/1993 Research fellow, Phys. Dep., Univ. Bielefeld, Prof. Dr. K. H. Welge
  • 7/1991 Habilitation, Univ. Bielefeld
  • 3/1993 – 6/1993 Scientist at the Max-Born-Institut
  • Since 7/1993 Department head at the Max-Born-Institut
  • Research Highlights

     

    Publications


    Publications at MBI

    List of own publications with no relation to MBI:

    • Atomic-hydrogen in intense short laser-pulses – a new series of photoelectron peaks from above threshold ionization
      H. Rottke, D. Feldmann, B. Wolff-Rottke and K. H. Welge, J. Phys. B: At. Mol. Opt. Phys. 26, L15-L22 (1993)
    • 5-photon ionization of atomic-hydrogen at wavelengths around the threshold for 4-photon ionization
      Y. Gontier, M. Trahin, B. Wolff-Rottke, H. Rottke, K. H. Welge and D. Feldmann, Phys. Rev. A 46, 5594-5599 (1992)
    • Singlet gerade Rydberg states of molecular-hydrogen
      H. Rottke and K. H. Welge J. Chem. Phys. 97, 908-926 (1992)
    • The energy-spectrum of photoelectrons produced by multiphoton ionization of atomic hydrogen
      M. Dörr, D. Feldmann, R. M. Potvliege, H. Rottke, R. Shakeshaft, K. H. Welge and B. Wolff-Rottke, J. Phys. B: At. Mol. Opt. Phys. 25, L275-L280 (1992)
    • Surface sum-frequency mixing for autocorrelation and cross-correlation of ultrashort UV and IR pulses
      W. Plass, H. Rottke, W. Heuer, G. Eichhorn and H. Zacharias, Appl. Phys. B-Photophys. Laser Chem. 54, 199-201 (1992)
    • Multiphoton ionization of atomic-hydrogen in intense subpicosecond laser-pulses
      H. Rottke, B. Wolff, M. Brickwedde, D. Feldmann and K. H. Welge, Phys Rev. Lett. 64, 404-407 (1990)
    • Resonant multiphoton ionization of xenon in intense sub-ps-laser pulses
      H. Rottke, B. Wolff, M. Tapernon, K. H. Welge and D. Feldmann, Z. Phys. D-At. Mol. Clust., 15, 133-139 (1990)
    • Hydrogen atom in crossed magnetic and electric fields
      G. Wiebusch, J. Main, K. Krüger, H. Rottke, A. Holle and K. H. Welge, Phys. Rev. Lett. 62, 2821-2124 (1989)
    • Quasi-Landau spectrum of the chaotic diamagnetic hydrogen atom
      A. Holle, J. Main, G. Wiebusch, H. Rottke, and K. H. Welge, Phys. Rev. Lett. 61, 161-164 (1988)
    • Multiphoton ionization of hydrogen-atoms in intense laser-fields
      B. Wolff, H. Rottke, D. Feldmann and K. H. Welge, Z. Phys. D-At. Mol. Clust. 10, 35-43 (1988)
    • Diamagnetism of the hydrogen-atom in the quasi-Landau regime
      A. Holle, G. Wiebusch, J. Main, B. Hager, H. Rottke and K. H. Welge, Phys. Rev. Lett. 56, 2594-2597 (1986)
    • Photoionization of the hydrogen-atom near the ionization limit in strong electric-fields
      H. Rottke and K. H. Welge, Phys. Rev. A 33, 301-311 (1986)
    • Generation of nuclear-spin-polarized protons by resonant ionization of hydrogen-atoms
      H. Rottke and H. Zacharias, Phys. Rev. A 33, 736-738 (1986)
    • Tunable VUV laser excitation of H2
      W. Meier, H. Rottke, H. Zacharias and K. H. Welge, Ber. Bunsen-Gesellsch.-Phys. Chem. Chem. Phys. 89, 313-313 (1985)
    • State-selective photoionization and photodissociation spectroscopy of the H2 molecule from excited-states
      H. Rottke and K. H. Welge, Jour. de Physique 46, 127-134 (1985)
    • Rotational state selective photoionization of the H2 molecule from B1S+u (v’ = 0, 3) states
      W. Meier, H. Rottke, H. Zacharias and K. H. Welge, J. Chem. Phys. 83, 4360-4363 (1985)
    • Photoionization of single rotational levels in excited B2P, C2P and D2S+ states of 14N16O
      H. Rottke and H. Zacharias, J. Chem. Phys. 83, 4831-4844 (1985)
    • Laser spectroscopy of highly excited hydrogen-atoms in electric and magnetic-fields
      H. Rottke, A. Holle and K. H. Welge, Lecture Notes in Phys. 229, 199-207 (1985)
    • Sensitive detection of CO by tunable VUV laser excitation of the B1S+ state
      H. Rottke and H. Zacharias, Opt. Comm. 55, 87-90 (1985)
    • State selective 2-step laser spectroscopy of the hydrogen-atom and molecule
      H. Rottke and K. H. Welge, J. Opt. Soc. Amer. B 1, 485-486 (1984)
    • State-selective resonant excitation ionization of H2 with tunable VUV laser-light
      H. Rottke and K. H. Welge, Chem. Phys. Lett. 99, 456-460 (1983)
    • Multi-photon ionization of methyl-iodide and selective stepwise ionization of methyl radicals
      J. Danon, H. Zacharias, H. Rottke and K. H. Welge, J. Chem. Phys. 76, 2399-2406 (1982)
    • Sensitivity and mass selectivity of NO detection by stepwise photo-ionization
      H. Zacharias, H. Rottke and K. H. Welge, Appl. Phys. 24, 23-28 (1981)
    • Resonant 2-photon ionization of H-atom and D-atom
      H. Zacharias, H. Rottke, J. Danon and K. H. Welge, Opt. Comm. 37, 15-19 (1981)
    • High sensitive detection of molecules with a tunable UV-VUV laser mass spectrometer
      H. Zacharias, H. Rottke and K. H. Welge, J. Opt. Soc. Amer. 70, 1386-1386 (1980)
    • Photo-ionization of CO and NO by tunable VUV laser-radiation
      H. Zacharias, H. Rottke and K. H. Welge, Opt. Comm. 35, 185-188 (1980)