Third-harmonic generation in two-dimensional pseudo-dot system with an applied magnetic field

► The THG in pseudo-dot with an applied magnetic field is studied. ► THG coefficient is obtained by using compact-density matrix and iterative method. ► The geometrical size of the pseudo-dot system has evidently influences on THG. ► The external magnetic field also has evidently influences on THG. ► The influences on THG of geometrical size and magnetic field are different.