Directional emission of multiply charged ions during dissociative ionization in asymmetric two-color laser fields

Intense, asymmetric 1ω+2ω laser fields are used to affect the directional ejection of multiply charged ion fragments from a variety of molecules, including N2, O2, CO, HBr, and CO2. By tuning the relative phase, ϕ, between the two fields, we observe large forward-backward dissociation asymmetries. T...

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Veröffentlicht in:Physical review letters 2010-11, Vol.105 (22), p.223002-223002, Article 223002
Hauptverfasser: Betsch, K J, Pinkham, D W, Jones, R R
Format: Artikel
Sprache:eng
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Zusammenfassung:Intense, asymmetric 1ω+2ω laser fields are used to affect the directional ejection of multiply charged ion fragments from a variety of molecules, including N2, O2, CO, HBr, and CO2. By tuning the relative phase, ϕ, between the two fields, we observe large forward-backward dissociation asymmetries. The largest asymmetries are obtained at the same values of ϕ for all species, suggesting a common dynamical mechanism. Following an independent phase calibration, the sign of the asymmetry appears to be opposite that expected from the standard enhanced ionization model.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.105.223002