Control of Electron Excitation and Localization in the Dissociation of H{sub 2}{sup +} and Its Isotopes Using Two Sequential Ultrashort Laser Pulses

Journal Article · Fri Aug 24 04:00:00 EDT 2007 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.99.083002· OSTI ID:21028164

Feng, He; Ruiz, Camilo; Becker, Andreas ^[1]

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1. Max-Planck-Institut fuer Physik Komplexer Systeme, Noethnitzer Str.38, D-01187 Dresden (Germany)

We study the control of dissociation of the hydrogen molecular ion and its isotopes exposed to two ultrashort laser pulses by solving the time-dependent Schroedinger equation. While the first ultraviolet pulse is used to excite the electron wave packet on the dissociative 2p{sigma}{sub u} state, a second time-delayed near-infrared pulse steers the electron between the nuclei. Our results show that by adjusting the time delay between the pulses and the carrier-envelope phase of the near-infrared pulse, a high degree of control over the electron localization on one of the dissociating nuclei can be achieved (in about 85% of all fragmentation events). The results demonstrate that current (sub-)femtosecond technology can provide a control over both electron excitation and localization in the fragmentation of molecules.

• OSTI ID: 21028164
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 8 Vol. 99; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
DISSOCIATION
ELECTRONS
EXCITATION
HYDROGEN IONS 2 PLUS
HYDROGEN ISOTOPES
LASERS
PULSES
SCHROEDINGER EQUATION
TIME DELAY
TIME DEPENDENCE
ULTRAVIOLET RADIATION
WAVE PACKETS