Berlin 2005 – scientific programme

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MO: Molekülphysik

MO 33: Quantum Control I

MO 33.3: Talk

Monday, March 7, 2005, 14:45–15:00, HU 2091

Optimal Control of Fragmentation in Fullerenes and Model Dipeptides: Selective Mode Excitation Using Temporally Shaped Pulses? — •T. Laarmann, I. Shchatsinin, M. Boyle, C.-P. Schulz, A. Stalmashonak, N. Zhavoronkov, and I.-V. Hertel — Max-Born Institut, Max-Born-Str. 2a, D-12489 Berlin, Germany

Optimal control of molecular processes using intense femtosecond lasers is one of the hot topics in modern laser science [1]. The goal is to manipulate molecular potential energy surfaces by the strong laser field, which forces a molecular system into a specific relaxation pathway. Temporally shaped laser pulses have become a much appraised technique for controlling and possibly analysing reaction pathways in complex systems. Closed feedback loop optimisation allows one to find optimal excitation schemes on potential energy surfaces without prior knowledge of their structure. We have applied this technique to obtain systematic control on fragmentation processes in C60 and in protected amino acids (Ac-Phe-NHMe), which can be regarded as ”model dipeptides”.

[1] A. D. Bandrauk, R. J. Gordon, and Y. Fujimura, Laser Control and Manipulation of Molecules (ACS Symposium Series Vol. 821, Oxford University Press, Oxford, 2002)