AI Article Synopsis

  • * The initial wave packet was interfered with a copy of the first laser pulse, allowing us to observe changes in population for different molecular states.
  • * We successfully reconstructed a specific wave packet (with J=0) and identified distinct phase shifts that indicate a stepwise Raman excitation process beyond the usual weak perturbation theories.

Article Abstract

We have experimentally determined the amplitudes and phases of a rotational wave packet in an adiabatically cooled benzene molecule, created by a nonresonant intense femtosecond laser field. In this wave-packet reconstruction, the initial wave packet is further interfered by a replica of the first laser pulse, and the resultant modulation in population is observed in a state-resolved manner. Though several states with different nuclear-spin modifications are populated in the initial condition, a single wave packet created from one of them (with J=0) is specifically reconstructed. Phase shifts characteristic of stepwise Raman excitation beyond the perturbative regime are experimentally identified.

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Source
http://dx.doi.org/10.1103/PhysRevLett.101.053002DOI Listing

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