Strongly driven quantum pendulum of the OCS molecule
  We demonstrate and analyze a strongly driven quantum pendulum in the angular motion of stateselected and laser aligned OCS molecules. Raman-couplings during the rising edge of a 50-picosecond laser pulse create a wave packet of pendular states, which propagates in the confining potential formed by the polarizability interaction between the molecule and the laser field. This wave-packet dynamics manifests itself as pronounced oscillations in the degree of alignment with a laser-intensity dependent period. 
S. Trippel, T. Mullins, N. L. M. M\"uller, J. S. Kienitz, J. J.   Omiste, H. Stapelfeldt, R. Gonz\'alez-F\'erez, and J. K\"upper
quant-ph physics.chem-ph physics.comp-ph