Pulse-train control of photofragmentation at constant field energy

Ashwani Kumar Tiwari, Niels Engholm Henriksen

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We consider a phaselocked two-pulse sequence applied to photofragmentation in the weak-field limit. The two pulses are not overlapping in time, i.e., the energy of the pulse-train is constant for all time delays. It is shown that the relative yield of excited Br* in the nonadiabatic process: I + Br*←IBr → I + Br, changes as a function of time delay when the two excited wave packets interfere. The underlying mechanisms are analyzed and the change in the branching ratio as a function of time delay is only a reflection of a changing frequency distribution of the pulse train; the branching ratio does not depend on the detailed pulse shape.
Original languageEnglish
Article number204301
JournalJournal of Chemical Physics
Issue number20
Pages (from-to)204301
Publication statusPublished - 2014


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