The linear and nonlinear intersubband optical absorption coefficients and refractive index changes in a V-shaped quantum well under the applied electric and magnetic fields

In this study, the changes in the optical absorption coefficients and the refractive index in a V-shaped quantum well have investigated theoretically. Within the effective mass approximation, the electronic structure of the V-shaped quantum well is calculated by numerical methods from the Schrödinger equation. Optical properties are obtained using the compact density-matrix approach. In the present work, the linear, third-order nonlinear and total absorption and refractive index changes investigated as a function of the quantum well width, the incident optical intensity, strengths of the magnetic and electric fields. Our results show that the magnetic and electric fields strengths, the quantum well width and incident optical intensity have a great effect on the optical characteristics of these structures.

► The effects of the well width, the incident optical intensity on the optical properties of the VQW under B→ are investigated. ► Our results show that the well width, the incident optical intensity really affect the optical characteristics of VQW. ► The intersubband optical and refractive index changes investigated as a function of the strength of the magnetic field. ► The magnetic field strength has a great effect on the linear, nonlinear and total absorption and refractive index changes.