Journal
PHYSICAL REVIEW A
Volume 77, Issue 1, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.77.013407
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Ionization of neutral D-2 molecules by a short and intense pump laser pulse may create a vibrational wave packet on the lowest (1s sigma(+)(g)) adiabatic potential curve of the D-2(+) molecular ion. We investigate the possibility of manipulating the bound motion, dissociation, and vibrational-state composition of D-2(+) nuclear wave packets with ultrashort, intense, near infrared control laser pulses. We show numerically that a single control pulse with an appropriate time delay can quench the vibrational state distribution of the nuclear wave packet by increasing the contribution of a selected stationary vibrational state of D-2(+) to more than 50%. We also demonstrate that a second control pulse with a carefully adjusted delay can further squeeze the vibrational-state distribution, thereby suggesting a multipulse control protocol for preparing almost stationary excited nuclear wave functions. The subsequent fragmentation of the molecular ion with a probe pulse provides a tool for assessing the degree at which the nuclear motion in small molecules can be controlled.
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