Polaron effects on the second-harmonic generation in asymmetrical semiexponential quantum wells

Authors : Bo XİAO, Kangxian GUO, Sen MOU, Zhongmin ZHANG

Pages : 114-121

Doi:10.3906/fiz-1407-25

View : 24 | Download : 10

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Polaron effects on the second-harmonic generation insert ignore into journalissuearticles values(SHG); in asymmetrical semiexponential quantum wells insert ignore into journalissuearticles values(ASEQWs); are investigated theoretically. By using the framework of the compact-density-matrix approach and iterative method, the analytical expression of the SHG coefficients in ASEQWs is presented. Numerical results are illustrated for a typical GaAs/AlGaAs. By considering the electron--LO--phonon interaction insert ignore into journalissuearticles values(ELOPI);, the energy levels and the wave functions of an electron confined in ASEQWs are obtained. It is found that whether we consider the ELOPI or not, the incident photon frequency $\omega$ and parameters $U_0$ and $\sigma$ also affect the SHG coefficient obviously.
Keywords : Quantum well, second harmonic generation