Controlling high-order harmonic generation and above-threshold ionization with an attosecond-pulse train

Journal Article · Wed Nov 15 04:00:00 EST 2006 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.74.053416· OSTI ID:20974769

Salieres, P; Villain, P ^[1]; Lewenstein, M ^[2]

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1. CEA-SPAM, Bat. 522, Centre d'Etudes de Saclay, F-91191 Gif-Sur-Yvette (France)
2. ICREA, Institucio Catalana di Recerca i Estudis Avancats, and ICFO, Institut de Ciencies Fotoniques, E-08860 Castelldefels (Barcelona) (Spain)

We perform a detailed analysis of how high-order harmonic generation (HHG) and above-threshold ionization (ATI) can be controlled by a time-delayed attosecond-pulse train superposed to a strong, near-infrared laser field. In particular we show that the high-order harmonic and photoelectron intensities, the high-order harmonic plateau structure and cutoff energies, and the ATI angular distributions can be manipulated by changing this delay. This is a direct consequence of the fact that the attosecond pulse train can be employed as a tool for constraining the instant an electronic wave packet is ejected in the continuum. A change in such initial conditions strongly affects its subsequent motion in the laser field, and thus HHG and ATI. In our studies, we employ the strong-field approximation and explain the features observed in terms of interference effects between various electron quantum orbits. Our results are in agreement with recent experimental findings and theoretical studies employing purely numerical methods.

• OSTI ID: 20974769
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 5 Vol. 74; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ANGULAR DISTRIBUTION
APPROXIMATIONS
ELECTRONS
HARMONIC GENERATION
INTERFERENCE
IONIZATION
LASER RADIATION
OPTICS
ORBITS
PHOTOELECTRON SPECTROSCOPY
PHOTOIONIZATION
PHOTON-ATOM COLLISIONS
PULSES
TIME DELAY
WAVE PACKETS