Ultrafast chemical dynamics by intense-laser field dissociative ionization

S. A. Trushin; Werner Fuss; K. K. Pushpa; W. E. Schmid

doi:10.1117/12.468909

30 May 2002 Ultrafast chemical dynamics by intense-laser field dissociative ionization

S. A. Trushin, Werner Fuss, K. K. Pushpa, W. E. Schmid

Proceedings Volume 4749, ICONO 2001: Novel Trends in Nonlinear Laser Spectroscopy and Optical Diagnostics and Lasers in Chemistry, Biophysics, and Biomedicine; (2002) https://doi.org/10.1117/12.468909
Event: XVII International Conference on Coherent and Nonlinear Optics (ICONO 2001), 2001, Minsk, Belarus

Abstract

When investigating photochemical dynamics, one usually measures the time for disappearance of the primary excited state or the appearance of the product state or the total time the molecule needs for traveling from the former to the latter. Quantum chemistry predicts, however, that molecules often pas on this way via intermediate potential energy surfaces and conical intersections, the path sometimes branching and changing direction. In the conventional methods this intermediate region remains in the dark. We show that probing by intense-laser field ionization and mass-selective detection provides surprisingly many time constants which can reveal this region and thus practically allow to 'look into the black box', it is thus possible to monitor the molecule's pathway all along the potential energy surfaces from the initially excited region down to the ground state of the product. Even driving forces can be recognized. We discuss these and other advantages, but also pitfalls of this method and compare it with other methods of probing.

Citation Download Citation

S. A. Trushin, Werner Fuss, K. K. Pushpa, and W. E. Schmid "Ultrafast chemical dynamics by intense-laser field dissociative ionization", Proc. SPIE 4749, ICONO 2001: Novel Trends in Nonlinear Laser Spectroscopy and Optical Diagnostics and Lasers in Chemistry, Biophysics, and Biomedicine, (30 May 2002); https://doi.org/10.1117/12.468909

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