Polaron effects on the third-harmonic generations in a two-dimensional quantum pseudodot system

The third-harmonic generations (THG) considering polaron effects in the two-dimensional quantum pseudodot system with a uniform magnetic field are theoretically studied. It is found that the THG coefficient is strongly affected not only by an external magnetic field, but also by the geometrical size of the pseudodot system. Moreover, the theoretical values of the THG is obviously increased when considering the electron–LO–phonon interaction.

► The THG is greatly enhanced when considering the polaron effects.
► The THG coefficient is affected by the geometrical size of the pseudodot system.
► The larger the V0V0 is, the lower value of the THG coefficient resonant peak is.