Effects of hydrostatic pressure and electric field on the electron-related optical properties in GaAs multiple quantum well

The properties of the electronic structure of a finite-barrier semiconductor multiple quantum well are investigated taking into account the effects of the application of a static electric field and hydrostatic pressure. With the information of the allowed quasi-stationary energy states, the coefficients of linear and nonlinear optical absorption and of the relative refractive index change associated to transitions between allowed subbands are calculated with the use of a two-level scheme for the density matrix equation of motion and the rotating wave approximation. It is noticed that the hydrostatic pressure enhances the amplitude of the nonlinear contribution to the optical response of the multiple quantum well, whilst the linear one becomes reduced. Besides, the calculated coefficients are blueshifted due to the increasing of the applied electric field, and shows systematically dependence upon the hydrostatic pressure. The comparison of these results with those related with the consideration of a stationary spectrum of states in the heterostructure-obtained by placing infinite confining barriers at a conveniently far distance-shows essential differences in the pressure-induced effects in the sense of resonant frequency shifting as well as in the variation of the amplitudes of the optical responses. Copyright © 2017 American Scientific Publishers All rights reserved.

• Fecha de publicación: 2017
• Institución: Universidad de Medellín
• Repositorio: Repositorio UDEM
• Idioma: eng
• OAI Identifier: oai:repository.udem.edu.co:11407/4273
• Acceso en línea: http://hdl.handle.net/11407/4273
• Palabra clave: Electric field; Hydrostatic pressure; Multiple quantum well; Optical properties; Electric fields; Electromagnetic wave absorption; Electronic structure; Equations of motion; Hydraulics; Hydrostatic pressure; Light absorption; Matrix algebra; Natural frequencies; Nonlinear equations; Nonlinear optics; Optical properties; Quantum optics; Refractive index; Semiconducting indium compounds; Density matrix equations; Gaas multiple quantum wells; Nonlinear contributions; Nonlinear optical absorption; Pressure induced effects; Refractive index changes; Rotating wave approximations; Static electric fields; Semiconductor quantum wells
• License: http://purl.org/coar/access_right/c_16ec