Phase Measurement of Resonant Two-Photon Ionization in Helium

• Type: Article in International Scientific Journal
• Date: 2010

Authors

M. Swoboda (Author) Other; T. Fordell (Author) Other; K. Klunder (Author) Other; J.M. Dahlstrom (Author) Other; M. Miranda (Author) FCUP; C. Buth (Author) Other; K.J. Schafer (Author) Other; J. Mauritsson (Author) Other; A. L'Huillier (Author) Other; M. Gisselbrecht (Author) Other

Journal

Title: Physical Review Letters

Vol. 104 No. 10

ISSN: 0031-9007

Publisher: American Physical Society

Indexing

ISI Web of Science

Scientific classification

FOS: Natural sciences > Physical sciences

Other information

Abstract (EN): We study resonant two-color two-photon ionization of helium via the 1s3p P-1(1) state. The first color is the 15th harmonic of a tunable Ti:sapphire laser, while the second color is the fundamental laser radiation. Our method uses phase-locked high-order harmonics to determine the phase of the two-photon process by interferometry. The measurement of the two-photon ionization phase variation as a function of detuning from the resonance and intensity of the dressing field allows us to determine the intensity dependence of the transition energy.

Language: English

Type (Professor's evaluation): Scientific