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Adaptive Quantum Control of Femtochemistry

We review some of our work on quantum control employing adaptively shaped femtosecond laser pulses. In this technique, a learning algorithm uses direct experimental feedback signals to optimize user-defined objectives in chemical reaction control. Laser pulses are modified in frequency-domain pulse shapers, which apart from phase-and-intensity modulation can be used also to modify the polarization state of light as a function of time. We present experimental examples on automated femtosecond pulse compression, control of gas-phase molecular femtochemistry, and control of photophysical objectives under liquid-phase conditions.