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Journal Articles Journal of Physics B: Atomic, Molecular and Optical Physics Year : 2005

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

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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.

Dates and versions

hal-00574172 , version 1 (07-03-2011)

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Cite

O. Guyetand, M. Gisselbrecht, A. Huetz, P. Agostini, R. Taïeb, et al.. Multicolour above-threshold ionization of helium: quantum interference effects in angular distributions. Journal of Physics B: Atomic, Molecular and Optical Physics, 2005, 38 (22), pp.L357-L363. ⟨10.1088/0953-4075/38/22/L01⟩. ⟨hal-00574172⟩
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