Dresden 2011 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 24: Poster: Femtosecond spectroscopy

MO 24.1: Poster

Donnerstag, 17. März 2011, 16:00–18:00, P2

Two-dimensional vibronic spectroscopy of coherent wave-packet motion — •Alexander Schubert and Volker Engel — Institut für Physikalische und Theoretische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg

We study two-dimensional (2D) spectroscopic signals obtained from femtosecond pulse interactions with diatomic molecules. The vibrational wave-packet dynamics is monitored in the signals. During the motion in the anharmonic potentials the wave packets exhibit vibrational revivals and fractional revivals which are associated with particular quantum phases. The time-dependent phase changes are identified by inspection of the complex valued 2D-spectra [1]. We use the Na₂ molecule as a numerical example and discuss various pulse sequences which yield information about vibrational level structure and phase relationships in different electronic states.

[1] Schubert, K. Renziehausen, V. Engel, Phys. Rev. A 82, 013419 (2010).