Influence of high harmonic generation of isotopic molecules

The time-dependent-wave-packet plus the split-operator-Fourier method has been applied to studying the influence on the high harmonic generation of the different isotopes. The recollision probabilities of the isotopes H2, D2, and T2 have been got by solving the time-dependent Schr-dinger equation depicting the correlation between the electron and its parent ions in the intense laser field. Although the electron will return several times to recollide with its parent ion during the laser pulses the largest probability to each isotope molecule occurs in the first optical period. Compared the recollision probabilities during the last two optical periods, T2 isotope has the largest probability. In addition, the ionization rates of the isotopes have be