Dissociation dynamics of molecules subject to intense ultrashort laser pulses

Abstract

The probing time for sampling the internal dynamics of a molecular system should becomparable to the time scale associated with the internal motion in a molecule whichranges from femtoseconds fs to picoseconds ps Recent development in laser technologymake it possible to probe a molecular system with intense and ultrashort laserpulses with large bandwidth In the presence of intense 10 100 TW cm2 and ultrashort 25 fs laser field amolecule may go through ionization and eventually dissociates into various ionic andneutral fragments Several transient electronic processes plays an key role in the moleculardissociation dynamics in the presence of intense ultrashort laser field One of thepossible ways to understand the dissociation dynamics of the molecular system throughvarious complex electronic processes is by capturing the velocity spread and the angulardistribution of the ionic fragments with respect to the polarization axis of the laserfield The main objective of this work is to understand the influence of the electronic processesin the dissociation dynamics Two different aspects of the electronic processeshave been addressed here by using a Velocity Map Imaging VMI technique along withdetailed quantum chemistry calculations newline newline