München 2004 – scientific programme
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MO: Molekülphysik
MO 12: Poster I
MO 12.8: Poster
Tuesday, March 23, 2004, 14:00–16:00, Schellingstr. 3
Control of molecular photodynamics by strong-field alignment in solids — •Toni Kiljunen1, Burkhard Schmidt2, and Nikolaus Schwentner1 — 1Institut für Experimentalphysik, FU-Berlin, Arnimallee 14, 14195 Berlin — 2Institut für Mathematik II, FU-Berlin, Arnimallee 2–6, 14195 Berlin
Molecular response to intense nonresonant laser fields is studied theoretically, in terms of alignment of a molecule with field polarization. The oscillating field induces anisotropic polarization and the energy gain in the field leads to formation of pendular states, i.e. directional hybridizations of free molecule rotations. Two qualitatively different time scales are interrogated in the process: adiabatic regime, where the population on excited molecular rotational states follows the laser pulse envelope, and ultrafast regime, where post-pulse alignment occurs. The effect of condensed phase surrounding, such as a solid rare gas hindering the induced molecular rotation, is assessed by incorporation of highly symmetric model potentials in the time-dependent Schrödinger equation. The main goal of the research is to attain optical control on molecular photophysics and -chemistry by affecting product yields of photoprocesses, such as dissociation and recombination, via suitable preorientation in condensed phase conditions.