Physical Review A (Atomic, Molecular, and Optical Physics) -- November 1999 -- Volume 60, Issue 5 pp. 3663-3666

Infrared-laser control of vibrational state redistribution during molecular dissociation: The time-dependent flux method in model simulations for HONO₂ in the excited electronic state

M. Oppel¹ and G. K. Paramonov^1,2

¹Institut für Physikalische und Theoretische Chemie, Freie Universität Berlin, WE 3, Takustrasse 3, D-14195 Berlin, Germany
²National Academy of Sciences of Belarus, Institute of Physics, Skaryna Avenue 70, 220602 Minsk, Republic of Belarus

(Received 11 March 1999)

The time-dependent flux redistribution analysis is applied to model simulations of selective breaking of the ON single bond in the excited electronic state of HONO₂ and control of vibrational state redistribution of the OH fragment by infrared-laser pulses. Control over vibrational state redistribution of the OH(v) fragment is demonstrated, with the OH(v = 0)/OH(v = 1) branching ratio being changed by about a factor of 30 and the dissociation probability approaching 100% on a picosecond time scale. ©1999 The American Physical Society PACS: 33.80.Gj, 34.50.Gb, 34.50.Rk