title: Chirp and polarization control of femtosecond molecular fragmentation.
abstract: We explore the simultaneous effect of chirp and polarization as the two control parameters for non-resonant photo-dissociation of n-propyl benzene. Experiments performed over a wide range of laser intensities show that these two control knobs behave mutually exclusively. Specifically, for the coherently enhanced fragments (C3H3+, C5H5+) with negatively chirped pulses and C6H5+with positively chirped pulses, polarization effect is the same as compared to that in the case of transform-limited pulses. Though a change in polarization affects the overall fragmentation efficiency, the fragmentation pattern of n-propyl benzene molecule remains unaffected in contrast to the chirp case.
authors.affiliation: Department of Chemistry, Indian Institute of Technology, Kanpur 208 016, Uttar Pradesh, India.
authors.forename: T
authors.initials: T
authors.lastname: Goswami
authors.forename: D K
authors.initials: DK
authors.lastname: Das
authors.forename: S K Karthick
authors.initials: SK
authors.lastname: Kumar
authors.forename: D
authors.initials: D
authors.lastname: Goswami
keywords: Chirp pulses; Control; Femtochemistry; Photodissociation