Inverse Faraday effect and ulytafast magnetization

Theory of the inverse Faraday effect in view of ultrafast magnetization experiments.
Daria Popova, Andreas Bringer, and Stefan Blügel
Phys. Rev. B 84, 214421 (2011)

The three-level system investigated. The laser pulse causes transitions from the initial state |i to the
intermediate |j  and then to the final one |f , with a magnetic state different from the one of the initial state.