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

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, , Citation M. Ilchen et al 2017 J. Phys.: Conf. Ser. 875 022029 DOI 10.1088/1742-6596/875/3/022029

1742-6596/875/3/022029

Synopsis

Intense, circularly polarized extreme-ultraviolet (XUV) and near-infrared (NIR) laser pulses are combined to double-ionize 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.

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10.1088/1742-6596/875/3/022029