Multicolour above-threshold ionization of helium: quantum interference effects in angular distributions

TitleMulticolour above-threshold ionization of helium: quantum interference effects in angular distributions
Publication TypeJournal Article
Year of Publication2005
Guyetand, O, Gisselbrecht, M, Huetz, A, Agostini, P, Taieb, R, Veniard, V, Maquet, A, Antonucci, L, Boyko, O, Valentin, C, Douillet, D
JournalJOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
Volume38
Issue22
PaginationL357-L363
Date PublishedNOV 28
ISSN0953-4075
Keywordspaper
Abstract

Energy- and angle-resolved photoionization spectra of He irradiated by linearly polarized intense 810 run 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 degrees lobes which depend on the relative IR-XUV phase. Application to the characterization of attosecond pulses is suggested.

DOI10.1088/0953-4075/38/22/L01
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