Fig. 4: XUV photoemission circular dichroism and orbital character of light-dressed states.

a Experimentally measured energy-momentum cut along K-Γ-K′ direction, at pump-probe overlap, using right-circularly-polarized IR pump and integrated for all XUV quarter-wave plate angles, and b associated CD-ARPES. c Calculated CD-ARPES for circularly-polarized IR pump, including the contribution of both Floquet and Volkov transitions using theoretical approaches described in Methods. d–f Same as (a–c), but using s − polarized IR pump. g–i Orbital-resolved contributions to the trARPES signal along K-Γ-K′ direction, using s − polarized IR pump. For each subpanel, the signal associated with the +ℏω sideband has been multiplied such that its absolute intensity matches the one from the VB.