Line Plot from Scientific Research

In the case of near- s -polarized IR pulses, the measured photoemission momentum fingerprint of the +1 h Omega sideband (red circles) is qualitatively different to the Theta dependence expected from the dark corridor, and shows a distinct asymmetry with a minimum and maximum for Theta < pi and Theta > pi, respectively. Neither the Volkov-only (black dotted line) nor the Floquet-only (orange dashed) calculations predict this strong asymmetry. Agreement between experiment and theory can only be found if quantum path interference processes between Floquet and Volkov transitions are considered (red line).

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