Potential scattering in a bichromatic laser field: Plateau structures
Potential scattering of electrons in a strong bichromatic laser field is analyzed using the strong-field approximation and the second Born approximation in the scattering potential. In the intermediate step of the scattering process, the electron dynamics is determined only by the laser field and the electron can absorb energy from the laser field, which leads to the appearance of additional plateau and cutoff structures. The features of these structures are analyzed for various incident electron energies and scattering angles, for different laser intensities, and for various relative phases between the bichromatic field components. The electron spectrum strongly depends on this phase, meaning that coherent phase control is possible. For particular values of the relative phase, the rescattering plateau can be much longer than in the monochromatic field case. The results obtained are in agreement with classical estimates.