Single-shot imaging of surface molecular ionization in nanosystems

Using single-shot velocity map imaging technique, explosion imaging of different ion species ejected from 50 nm SiO 2 nanoparticles are obtained excitedly by strong near-infrared and ultraviolet femtosecond laser fields. Characteristic momentum distributions showing forward emission of the ions at low excitation intensities and shock wave behaviors at high intensities are observed. When the excitation intensity is close to the dissociative...