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A theoretical study on quantum control of photodissociation dynamics by ultrashort chirped laser pulses
Author(s) -
Mishima Kenji,
Yamashita Koichi
Publication year - 1999
Publication title -
international journal of quantum chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.484
H-Index - 105
eISSN - 1097-461X
pISSN - 0020-7608
DOI - 10.1002/(sici)1097-461x(1999)72:5<525::aid-qua5>3.0.co;2-o
Subject(s) - photodissociation , laser , dynamics (music) , ultrashort pulse , quantum , quantum control , physics , chemistry , atomic physics , optics , quantum mechanics , photochemistry , acoustics
By a wavepacket propagation, we demonstrate the possibility of controlling the photodissociation branching ratio between two fragment channels by a single ultrashort linearly chirped laser pulse. It is found that a negatively chirped pulse of a moderate chirp rate completely prohibits the production of one of the photofragment channels. Two characteristics of chirped laser pulses contribute to this remarkable effect: the mechanism of adiabatic rapid passage (ARP) for the population transfer between the ground and excited states and the intrapulse pump‐dump process for determining the branching ratio. ©1999 John Wiley & Sons, Inc. Int J Quant Chem 72: 525–532, 1999