Few-cycle laser pulses to obtain spatial separation of OHF- dissociation products.
J Chem Phys
; 130(2): 024310, 2009 Jan 14.
Article
en En
| MEDLINE
| ID: mdl-19154031
ABSTRACT
In a two-part theoretical study, field-free orientation of OHF(-) is achieved by means of moderately intense half-cycle, infrared laser pulses. In the first step, a short linearly polarized pulse excites a superposition of rigid rotor rotational eigenstates via interaction with the permanent dipole moment of OHF(-). After the field has been switched off, pronounced molecular orientation is observed for several picoseconds. In the second step, femtosecond few-cycle laser pulses are applied to the oriented system to steer vibrational dynamics, modeled by anharmonic vibrational wave functions calculated on a potential energy surface obtained with unrestricted fourth order Moller-Plesset ab initio calculations. The result is selective bond breaking of OHF, followed by the spatial separation of dissociation products in the space-fixed frame. Due to revivals in the rotational wavepacket, product yields can be enhanced over long times.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Oxígeno
/
Ácido Fluorhídrico
/
Modelos Teóricos
Idioma:
En
Revista:
J Chem Phys
Año:
2009
Tipo del documento:
Article
País de afiliación:
Alemania