Two-colour strong-field ionization and dissociation of H2 using 780 and 390 nm femtosecond pulses

摘要

We report the observation of a substantial enhancement in H+2 and H+ ion production when the two-colour (780 and 390 nm) pulses are superposed. A strong dependence of ion yield on the relative directions of the polarization of the two fields is observed. The experimental results are discussed and compared with existing theoretical calculations.