High-order harmonic spectroscopy of the Cooper minimum in argon: Experimental and theoretical study

Journal Article · Sun May 15 00:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.053401· OSTI ID:21546784

Higuet, J; Ruf, H; Constant, E; Cormier, E; Descamps, D; Mevel, E; Petit, S; Pons, B; Mairesse, Y; Fabre, B ^[1]; Thire, N; Cireasa, R ^[2]

---

1. CELIA, UMR5107 (Universite Bordeaux 1 - CNRS - CEA) 351, cours de la liberation - F-33405 Talence Cedex France (France)
2. Laboratoire Collisions Agregats Reactivite, (IRSAMC), UPS, Universite de Toulouse and CNRS, UMR 5589, F-31062 Toulouse (France)

We study the Cooper minimum in high-order-harmonic generation from argon atoms by using long wavelength laser pulses. We find that the minimum in high-order-harmonic spectra is systematically shifted with respect to total photoionization cross section measurements. We use a semiclassical theoretical approach based on classical trajectory Monte Carlo and quantum electron scattering methods to model the experiment. Our study reveals that the shift between photoionization and high-order-harmonic emission is due to several effects: the directivity of the recombining electrons and emitted polarization, and the shape of the recolliding electron wave packet.

• OSTI ID: 21546784
• Journal Information: Physical Review. A, Vol. 83, Issue 5; Other Information: DOI: 10.1103/PhysRevA.83.053401; (c) 2011 American Institute of Physics; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ARGON
CROSS SECTIONS
ELECTRON EMISSION
ELECTRONS
HARMONIC GENERATION
LASERS
MONTE CARLO METHOD
PHOTOIONIZATION
POLARIZATION
PULSES
SCATTERING
SEMICLASSICAL APPROXIMATION
SPECTRA
SPECTROSCOPY
WAVE PACKETS
WAVELENGTHS
APPROXIMATIONS
CALCULATION METHODS
ELEMENTARY PARTICLES
ELEMENTS
EMISSION
FERMIONS
FLUIDS
FREQUENCY MIXING
GASES
IONIZATION
LEPTONS
NONMETALS
RARE GASES