ULTRAFAST BENDING MOTION OF CO2 IN INTENSE LASER FIELDS STUDIED BY MOMENTUM IMAGING Akiyoshi Hishikawa, Atsushi Iwamae and Kaoru Yamanouchi Department of Chemistry, School of Science, University of Tokyo, Japan, and Japan Science and Technology Corporation, Japan Ultrafast deformation of geometrical structure of CO2 in an intense laser field (1.1 PW/cm2) was investigated by momentum imaging of the fragment ions produced from the Coulomb explosion processes. The observed large mean-amplitude along the O-C-O bond angle (~ 40 deg was attributed to the ultrafast bending motion induced on the light-dressed potential energy surfaces.