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Titolo:
A THEORETICAL-STUDY ON LASER CONTROL OF A MOLECULAR NONADIABATIC PROCESS BY ULTRASHORT CHIRPED LASER-PULSES
Autore:
MISHIMA K; YAMASHITA K;
Indirizzi:
UNIV TOKYO,GRAD SCH ENGN,DEPT APPL CHEM TOKYO 113 JAPAN UNIV TOKYO,GRAD SCH ENGN,DEPT CHEM SYST ENGN TOKYO 113 JAPAN
Titolo Testata:
The Journal of chemical physics
fascicolo: 5, volume: 109, anno: 1998,
pagine: 1801 - 1809
SICI:
0021-9606(1998)109:5<1801:ATOLCO>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
STIMULATED RAMAN-SCATTERING; COHERENT VIBRATIONAL MOTION; LEVEL QUANTUM-SYSTEMS; POPULATION TRANSFER; WAVE-PACKET; ELECTRONIC PREDISSOCIATION; SCHRODINGER-EQUATION; IMPULSIVE EXCITATION; MULTILEVEL SYSTEMS; DENSITY-MATRIX;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
70
Recensione:
Indirizzi per estratti:
Citazione:
K. Mishima e K. Yamashita, "A THEORETICAL-STUDY ON LASER CONTROL OF A MOLECULAR NONADIABATIC PROCESS BY ULTRASHORT CHIRPED LASER-PULSES", The Journal of chemical physics, 109(5), 1998, pp. 1801-1809

Abstract

We have theoretically studied the usefulness of ultrashort chirped laser pulses for laser control of photodissociation dynamics with a one-dimensional model system involving a potential well in the excited electronic state. The molecular System we treat in this paper entails three electronic states; a ground electronic state, and two excited electronic states; The ground electronic state is radiatively dipole-coupled with the lower of the-two excited electronic states, while the two excited electronic states are themselves connected by diabatic couplingpotential. Previously, ive:found a single linearly chirped ultrashort(in the order of fs) laser pulse can be employed to control photodissociation dynamics according to the sign of the chirp rate: A positivelychirped pulse traps the molecule in the excited state potential well,while-a negatively chirped pulse photodissociates the molecule rapidly. In the present paper we take into consideration the influence-of the strength of the diabetic coupling and the reduced mass of the molecular system and show such a-selectivity works best when the diabatic coupling is moderate and the molecular-system is light. We explain thesephenomena by a state selective excitation in vibrational states underthe condition of adiabatic rapid passage (ARP) population transfer. We solve the integrodifferential equation of the molecular system involving the vibrational states explicitly; which is a quite different approach from that for the atomic case. (C) 1998 American Institute of Physics.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/11/20 alle ore 03:53:02