Coincidence imaging of photoelectrons and photo-ions of molecules in strong laser fields

摘要

In recent years, reaction microscopes have become a powerful technique to image ultrafast dynamics in atoms and molecules. Here, we present the specific details of our reaction microscope that was designed to study molecular dynamics driven by intense femtosecond laser pulses. A supersonic molecular beam and laser focusing system was specially designed to confine molecules to the peak intensity of the laser focus. Reaction channels can be precisely identified and three-dimensional momentum vectors can be accurately acquired for correlated reaction products with high resolution. The molecular structure information can be extracted based on the experimentally measured momentum vectors of the photoelectrons and the photo-ions that are generated in the laser-molecule interaction.