Fig. 1 | Scientific Reports

Fig. 1

From: Breakdown of the electric dipole approximation at Cooper minima in direct two-photon ionisation

Fig. 1

Possible electric dipole ionisation channels in nonsequential two-photon ionisation of an s1/2 state by two right-circularly polarised photons. While both spin projections of the initial state can be promoted to a final d5/2 partial wave, selection rules dictate that only spin-down electron can be ionised into a partial wave with d3/2 symmetry. This figure has been generated using Mathematica 11.0.0.0 (https://www.wolfram.com/mathematica/) and Inkscape 0.92 (https://inkscape.org/).

Back to article page