Circular Dichroism in the Multi-Photon Ionization of Oriented Helium Ions

30th International Conference on Photonic, Electronic, and Atomic Collisions

Ilchen, M.^1,2 ; Douguet, N.^3 ; Mazza, T.^1 ; Rafipoor, A.J.^1 ; Callegari, C.^4 ; Finetti, P.^4 ; Plekan, O.^4 ; Prince, K.C.^4,5,6 ; Demidovich, A.^4 ; Grazioli, C.^4 ; Avaldi, L.^7 ; Bolognesi, P.^7 ; Coreno, M.^7 ; Di Fraia, M.^8 ; Devetta, M.^9 ; Ovcharenko, Y.^1 ; Düsterer, S.^10 ; Ueda, K.^11 ; Bartschat, K.^3 ; Grum-Grzhimailo, A.N.^1,12 ; Bozhevolnov, A.V.^13 ; Kazansky, A.K.^14,15,16 ; Kabachnik, N.M.^1,12 ; Meyer, M.^1

European XFEL GmbH, Holzkoppel 4, Schenefeld Hamburg

22869, Germany^1

PULSE at Stanford, 2575 Sand Hill Road, Menlo Park

CA

94025, United States^2

Department of Physics and Astronomy, Drake University, Des Moines

IA

50311, United States^3

Elettra-Sincrotrone Trieste, Basovizza

34149, Italy^4

Istituto Officina Dei Materiali, Consiglio Nazionale Delle Ricerche, Area Science Park, Trieste

34149, Italy^5

Molecular Model Discovery Laboratory, Department of Chemistry and Biotechnology, Swinburne University of Technology, Melbourne

VIC

3122, Australia^6

CNR Istituto Struttura della Materia, Via del Fosso del Cavaliere, Roma

100-00133, Italy^7

Department of Physics, University of Trieste, Trieste

34128, Italy^8

Istituto di Fotonica e Nanotecnologie CNR-IFN, Milano, Italy

(10) Deutsches Elektronen-Synchrotron (DESY), Notkestrasse 85, Hamburg

22603, Germany

(11) Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai

980-8577, Japan

(12) Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow

119991, Russia

(13) Sankt Petersburg State University, Universitetskaya nab. 7/9, Sankt Petersburg

199164, Russia

(14) Departamento de Fisica de Materiales, UPV/EHU, San Sebastian/Donostia

25018, Spain

(15) IKERBASQUE, Basque Foundation for Science, Bilbao

48011, Spain

(16) Donostia International Physics Center (DIPC), San Sebastian/Donostia

25018, Spain^9

关键词: AC Stark shift;    Atomic helium;    Circularly polarized;    Extreme ultraviolets;    Intensity-dependent;    Multiphoton ionization;    Near-infrared lasers;    Resonance state;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/875/3/022029/pdf
DOI  :  10.1088/1742-6596/875/3/022029

来源: IOP

【 摘 要 】

Synopsis Intense, circularly polarized extreme-ultraviolet (XUV) and near-infrared (NIR) laser pulses are combined to doubleionize atomic helium via the oriented intermediate He+(3p) resonance state. A strong and NIR-intensity dependent circular dichroism is accounted to a helicity dependent AC-Stark shift.