Hot electron dynamics in zincblende and wurtzite GaN

A theoretical investigation of the excess energy dissipation of highly exci ted photoinjected electrons in both wurtzite and zincblende GaN is presente d. The calculations are performed by solving numerically coupled quantum tr ansport equations for the carriers and the acoustic, transversal and longit udinal optical phonon in order to derive the evolution of their nonequilibr ium temperatures, dubbed quasi-temperatures. It is shown that the electron energy dissipation is always faster in the wurtzite structure than in zincb lende, both occurring in a subpicosecond time scale (< 0.2 ps).