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Circular Dichroism in Multiphoton Ionization of Resonantly Excited He+ Ions
journal contribution
posted on 2024-08-06, 11:14 authored by M. Ilchen, N. Douguet, T. Mazza, A. J. Rafipoor, C. Callegari, P. Finetti, O. Plekan, Kevin PrinceKevin Prince, A. Demidovich, C. Grazioli, L. Avaldi, P. Bolognesi, M. Coreno, M. Di Fraia, M. Devetta, Y. Ovcharenko, S. Düsterer, K. Ueda, K. Bartschat, A. N. Grum-Grzhimailo, A. V. Bozhevolnov, A. K. Kazansky, N. M. Kabachnik, M. MeyerIntense, circularly polarized extreme-ultraviolet and near-infrared (NIR) laser pulses are combined to double ionize atomic helium via the oriented intermediate He+(3p) resonance state. Applying angle-resolved electron spectroscopy, we find a large photon helicity dependence of the spectrum and the angular distribution of the electrons ejected from the resonance by NIR multiphoton absorption. The measured circular dichroism is unexpectedly found to vary strongly as a function of the NIR intensity. The experimental data are well described by theoretical modeling and possible mechanisms are discussed.
Funding
Directorate for Mathematical & Physical Sciences
Volkswagen Foundation
National Science Foundation
The Ministry of Education and Science of the Russian Federation
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1079-7114Journal title
Physical Review LettersVolume
118Issue
1Article number
article no. 013002Pagination
1 pPublisher
American Physical SocietyCopyright statement
Copyright © 2017 American Physical Society. The published version is reproduced here in accordance with the copyright policy of the publisher.Language
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