학술논문
Multicolour above-threshold ionization of helium: quantum interference effects in angular distributions
Document Type
Article
Author
Source
Journal of Physics B: Atomic, Molecular and Optical Physics; November 2005, Vol. 38 Issue: 22 pL357-L363, 7p
Subject
Language
ISSN
09534075; 13616455
Abstract
Energy- and angle-resolved photoionization spectra of He irradiated by linearly polarized intense 810 nm laser radiation and several of its XUV odd harmonics are investigated. The angular distribution of the odd-order peaks, produced by single-photon ionization by one harmonic, is, surprisingly, broadened by the IR field. The even-order ones, due to two-colour, two-photon ionization, show at 90° lobes which depend on the relative IR-XUV phase. Application to the characterization of attosecond pulses is suggested.