Düsseldorf 2007 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 56: Poster: Femtosecond Spectroscopy
MO 56.4: Poster
Donnerstag, 22. März 2007, 16:30–18:30, Poster A
Calculation and shaping of CARS spectra including rotations — •Jörg Liebers1,2, Soroosh Pezeshki1, Michael Schreiber2, and Ulrich Kleinekathöfer1 — 1International University Bremen (Jacobs University Bremen as of spring 2007), Campus Ring 1, 28759 Bremen — 2Institut für Physik, Technische Universität Chemnitz, 09107 Chemnitz
In experiments it is possible to mode-selectively excite molecules using feedback-controlled shaping of femtosecond laser pulses [1]. Here we use the theoretical tool of optimal control [2] to influence resonant and non-resonant femtosecond time-resolved coherent anti-Stokes Raman scattering (CARS) signals and spectra. The calculations are done by using time-dependent rotational and vibrational wave packet calculations together with perturbation theory in the laser field strength. For the non-resonant transitions an effective Schrödinger equation [3] is used to include the off-resonant states. The CARS signals can then be determined using the wave packets of different order in the field strength.
[1] J. Konradi, A. K. Singh, and A. Materny, PCCP. 7 3574 (2005)
[2] A. Kaiser and V. May, Chem. Phys. Lett. 405 339 (2005)
[3] D. Ambrosek, M. Oppel, L. Gonzalez, and V. May, Opt. Commun. 264 2 (2006)