Frankfurt 2006 – wissenschaftliches Programm

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MO: Molekülphysik

MO 27: Poster: Femtosecond Spectroscopy

MO 27.1: Poster

Dienstag, 14. März 2006, 16:30–18:30, Labsaal

Shaping of CARS spectra using optimal control theory — •S. Pezeshki, J. Liebers, M. Schreiber, and U. Kleinekathöfer — Institut 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 [1,2]. Here we use the theoretical tool of optimal control [3,4] to influence femtosecond time-resolved coherent anti-Stokes Raman scattering (CARS) signals and spectra. The calculations are done by using time-dependent wave packet calculations together with perturbation theory in the laser field strength. The CARS signals can then be determined using those wave packets of different order in the field strength.

[1] J. Konradi, A. K. Singh, and A. Materny, PCCP. 7 3574 (2005)

[2] N. Dudovich, D. Oron, and Y. Silberberg, Nature 418, 512 (2002).

[3] A. Kaiser and V. May, Chem. Phys. Lett. 405 339 (2005)

[4] J. Werschnik and E. K. U. Gross, J.Opt. B 7 S300 (2005)