Polaron effects on the optical absorptions in asymmetrical semi-parabolic quantum wells

✍ Scribed by Chao-Jin Zhang; Kang-Xian Guo

• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 242 KB
• Volume: 39
• Category: Article
• ISSN: 1386-9477
• DOI: 10.1016/j.physe.2007.01.011

✦ Synopsis

The linear and nonlinear optical absorptions considering the weak-coupling electron-LO-phonon interaction in asymmetrical semiparabolic quantum wells are theoretically investigated. The numerical results for the typical GaAs=Al x Ga 1Àx As material show that the factors of Al content x, the relaxation time and the photon energy have great influence on the optical absorption coefficients. Moreover, the theoretical values of the optical absorptions are more than a factor of 2-3 higher than the one in the structure without considering the electron-LO-phonon interaction by calculating.