Pulse Shape Spectroscopy of Strong Field Molecular Ionization

We make use of pulse shape spectroscopy and coincidence velocity map imaging to study strong field molecular ionization. We carry out momentum resolved measurements of fragment ions in coincidence and covariance arising from the strong field light-molecule interaction. The measurements are made as a function of pulse shape (with pulses as short as 6 fs), making use of several pulse shape parameterizations that highlight different molecular dynamics, including dissociation, isomerization and concerted elimination. Our velocity map imaging system can be switched to collect both ions and electrons in coincidence/covariance, giving us the ability to explore both structural changes and electronic dynamics driven by the strong laser fields.