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Issue 6, 2016
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Unravelling the role of quantum interference in the weak-field laser phase modulation control of photofragment distributions

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Abstract

The role played by quantum interference in the laser phase modulation coherent control of photofragment distributions in the weak-field regime is investigated in detail in this work. The specific application involves realistic wave packet calculations of the transient vibrational populations of the Br2(B,vf) fragment produced upon predissociation of the Ne–Br2(B) complex, which is excited to a superposition of overlapping resonance states using different fixed bandwidth pulses where the linear chirps are varied. The postpulse transient phase modulation effects observed on fragment populations for a long time window are explained in terms of the mechanism of interference between overlapping resonances. A detailed description of how the interference mechanism affects the magnitude and the time window of the phase control effects is also provided. In the light of the results, the conditions to maximize phase modulation control on fragment distributions are discussed.

Graphical abstract: Unravelling the role of quantum interference in the weak-field laser phase modulation control of photofragment distributions

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Article information


Submitted
09 Oct 2015
Accepted
05 Jan 2016
First published
14 Jan 2016

Phys. Chem. Chem. Phys., 2016,18, 4772-4779
Article type
Paper
Author version available

Unravelling the role of quantum interference in the weak-field laser phase modulation control of photofragment distributions

A. García-Vela and N. E. Henriksen, Phys. Chem. Chem. Phys., 2016, 18, 4772
DOI: 10.1039/C5CP06094J

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