Manipulation of the recombination channels and isolated attosecond pulse generation from HeH2+ with multicycle combined field

摘要: We present a method to manipulate the recombination channels in harmonic emission from HeH2+ via combing multicycle trapezoidal laser field and static electric field. By solving time-dependent Schrodinger equation, we find that positive peak intensity can steer electron localization by controlling transfer at time of polarization direction antiparallel permanent dipole HeH2+. With appropriate parameters, originating nucleus He2+ are effectively controlled enhancing around H+. Additionally, an isolated 48-as pulse be obtained superposing proper harmonics. Time-frequency maps, electronic wave packet probability density dressed picture Coulomb potential adopted provide underlying physical mechanism.