### Session L1: Poster Session II (4:00 pm - 6:00 pm)

4:00 PM–4:00 PM, Wednesday, June 15, 2011
Room: Atrium Ballroom BC

Abstract ID: BAPS.2011.DAMOP.L1.68

### Abstract: L1.00068 : H$_2^+$ dissociation fragments alignment after few-cycle pulse at mid-infrared regime

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#### Authors:

Shuo Zeng
(J.R.Macdonald Laboratory, Department of Physics, Kansas State University)

Fatima Anis
(J.R.Macdonald Laboratory, Department of Physics, Kansas State University)

Brett Esry
(J.R.Macdonald Laboratory, Department of Physics, Kansas State University)

By solving the time-dependent Schr\"odinger equation for H$_2^+$ numerically including nuclear rotation for H$_2^+$, we systematically analyzed the H$_2^+$ rotational dynamics after a few-cycle laser pulse for wavelengths in the range 800-2000~nm. This study extends our test of the axial recoil approximation reported in [1] to longer wavelengths. Individual initial vibrational states show different rotational behavior. Generally, dissociation fragments from lower vibrational states tend to anti-align along the laser polarization direction, while the fragments from higher initial states tend to align along the polarization direction. In addition, we found that the carrier-envelope phase does not influence the post-pulse rotation substantially even for the few-cycle pulse. \\[4pt] [1] F. Anis, T. Cackowski, and B. D. Esry, J. Phys. B 42, 091001 (2009)

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.DAMOP.L1.68