Phase time properties for an uncoupled multicomponent physical heterostructure

"The results of a calculation of the phase time as a function of different parameters of the semiconductor layered media to study are presented.Some general features are reported to be present in the tunneling of uncoupled holes for energies above and under the barrier height. Evidencesimilar to that observed for electrons and photons as Hartman predicted for the dependence of the tunneling time with the barrier thicknessis also reported."