Making and Measuring vibrational Wave Packets in Small Molecules Through Non-Resonant Impulsive Stimulated Raman Scattering

Published

May 1, 2002

Author(s)

D A. Samuels, T C. Weinacht, O L. Monti, E Gershgoren, S R. Leone, H C. Kapteyn, M M. Murnane, R A. Bartels

Abstract

This paper discusses the creation and measurement of large amplitude, impulsively excited vibrational wave packets in small polyatomimolecules (CO₂, SF₆, CCI₄,) and their photodissociation products. The wave packets are non-resonantly excited in the electronic ground stateusing, broad bandwidth infrared laser pulses. This makes the technique general and of direct relevance to reactions on the ground state potential energy surfaces, which have been largely inaccessible to wave packet studies. Multiple modes can be excited simultaneously, allowing for the measurement of coherences between modes as well as within a given mode. A simple theoretical model of the measurement allows for a comprehensive understanding of the interaction between the laser pulse and the molecular sample. We obtain information on vibrational dephasing and rephasing, intermode coherences, rotational dephasing, and dissociation. Wave packet excitation in Cl₂ (resulting fromdissociation of CCI₄,) is observed and discussed in detail.

Proceedings Title

Ultrafast Phenomena, International Conference | 13th | | Springer

Volume

No. 71

Conference Dates

May 1, 2002

Conference Location

Vancouver, 1, CA

Conference Title

Springer Series in Chemical Physics

Pub Type

Conferences

Keywords

impulsive excitation, vibrational wave packets

Citation

Samuels, D. , Weinacht, T. , Monti, O. , Gershgoren, E. , Leone, S. , Kapteyn, H. , Murnane, M. and Bartels, R. (2002), Making and Measuring vibrational Wave Packets in Small Molecules Through Non-Resonant Impulsive Stimulated Raman Scattering, Ultrafast Phenomena, International Conference | 13th | | Springer, Vancouver, 1, CA (Accessed December 16, 2024)