Ultrafast Deformation of the Geometrical Structure ofCO2Induced in Intense Laser Fields

Abstract

Ultrafast deformation of geometrical structure of ${\mathrm{CO}}_{2}$ in an intense laser field ( $1.1\mathrm{PW}/{\mathrm{cm}}^{2}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1.1\ifmmode\times\else\texttimes\fi{}{10}^{15}\mathrm{W}/{\mathrm{cm}}^{2}$) was investigated by momentum imaging of the fragment ${\mathrm{O}}^{p+}$ and ${\mathrm{C}}^{q+}$ $(p,q\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1\char21{}3)$ ions produced from ${\mathrm{CO}}_{2}^{z+}$ through the Coulomb explosion processes, ${\mathrm{CO}}_{2}^{z+}\ensuremath{\rightarrow}{\mathrm{O}}^{p+}+{\mathrm{C}}^{q+}+{\mathrm{O}}^{r+}$ $(z\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}p+q+r)$. The observed large mean amplitude along the $\ensuremath{\angle}\mathrm{O}\char22{}\mathrm{C}\char22{}\mathrm{O}$ bond angle ( $\ensuremath{\sim}40\ifmmode^\circ\else\textdegree\fi{}$) was attributed to the ultrafast bending motion induced on the light-dressed potential energy surfaces.