Nonlinear optical absorption via two-photon process in asymmetrical Gaussian potential quantum wells

• Published in: Superlattices and microstructures Vol. 77; pp. 267 - 275
• Main Authors: Phuc, Huynh Vinh, Tung, Luong Van, Vinh, Pham Tuan, Dinh, Le
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.01.2015
• Subjects: Asymmetry; Electric field; Electric potential; Gallium arsenide; Gaussian; Gaussian potential; Half-width; Magnetic fields; Mathematical analysis; Nonlinear optics; Nonlinearity; Phonon-assisted cyclotron resonance; Quantum wells; Gaussian potential; Electric field; Half-width; Nonlinear optics; Phonon-assisted cyclotron resonance
• ISSN: 0749-6036; 1096-3677
• DOI: 10.1016/j.spmi.2014.11.024

•Linear and nonlinear optical absorption spectra in AGPQWs have been investigated.•The results are calculated for GaAs and Ga1−xAlxAs materials.•The two-photon absorption process has been included.•There is a clear monotonic behavior of the resonant peaks and the half-width in both one and two-photon absorption processes. In this paper, linear and nonlinear optical absorption spectrum in asymmetrical Gaussian potential quantum wells under the applied magnetic and electric fields are studied via investigating the phonon-assisted cyclotron resonance (PACR) effect. The results are calculated for GaAs and Ga1−xAlxAs materials. Our results show that the optical absorption behaviors and the half-width are significantly dependent on the height of the Gaussian potential, the well width, the magnetic field, and the temperature. It is also found that there is a clear monotonic behavior of the resonant peaks and the half-width as functions of the factors mentioned above in both one and two-photon absorption processes.