Controlling vibrational wave packet motion with intense modulated Laser Fields

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DOIResolve DOI: http://doi.org/10.1103/PhysRevLett.90.203601
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TypeArticle
Journal titlePhysical Review Letters
Volume90
Issue20
Pages203601–; # of pages: 1
AbstractIntense, nonresonant laser fields produce Stark shifts that strongly modify the potential energy surfaces of a molecule. A vibrational wave packet can be guided by this Stark shift if the laser field is appropriately modulated during the wave packet motion. We modulated a 70 fs laser pulse with a period on the time scale of the vibrational motion (?10 fs) by mixing the signal and idler of an optical parametric amplifier. We used ionization of H2 or D2 to launch a vibrational wave packet on the ground state of H2+ or D2+. If the laser intensity was high as the wave packet reached its outer turning point, the Stark shift allowed the molecule to dissociate through bond softening. On the other hand, if the field was small at this critical time, little dissociation was measured. By changing the modulation period, we achieved control of the dissociation yield with a contrast of 90%.
Publication date
AffiliationNational Research Council Canada; NRC Steacie Institute for Molecular Sciences
Peer reviewedYes
NPARC number12332823
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Record identifier29f71c95-58e4-4623-b11b-6489511dc2fb
Record created2009-09-10
Record modified2016-05-09
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