Polaron influence on the third-order nonlinear optical susceptibility in cylindrical quantum wires

Electron-phonon interaction effect on third-harmonic generation (THG) in cylindrical quantum wires are investigated. The THG coefficient is obtained by using the compact-density-matrix approach and iterative method, and the numerical results are presented for GaAs cylindrical quantum wires. The results show that the THG coefficient is greatly enhanced and the peak shift to the aspect of high energy because of considering the influence of electron-phonon interaction.