Dresden 2011 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 39: Quantum Control

Q 39.5: Talk

Wednesday, March 16, 2011, 17:30–17:45, TOE 317

Product control of conical intersection driven photochemical reactions by steering electronic wavepackets — •Philipp von den Hoff and Regina de Vivie-Riedle — Department Chemie, Ludwig-Maximilians-Universität München, D-81377 München, Germany

Electrons and their dynamics are involved in bond breaking and formation, thus the idea to steer chemical reactions by localization of electronic wavepackets seems natural. The formation of a localized electronic wavepacket requires the superposition of two or more appropriate electronic states through e.g. an external electric field. The guiding of such an electronic wavepacket is only possible within the coherence time of the system. Here, we present a new UV-pump-IR-control scheme that allows us to control the product ratio of conical intersection driven photochemical reactions by steering an electronic wavepacket [1]. To test the proposed scheme, we constructed a two dimensional model system. Our calculations show, that we are able to steer the final product ratio very precisely by changing the carrier envelope phase of the control IR-pulse.

[1] P. von den Hoff, R. Siemering and R. de Vivie-Riedle, Ultrafast Phenomena XVII, Oxford University Press, (2010), in Press.