Electric field, magnetic field, and hydrostatic pressure effects on the absorption coefficient for GaAs/Al𝑥����Ga1−𝑥����As/Al0.3Ga0.7As staggered core–shell–shell spherical quantumdots

Abstract

Quantum dot’s optical properties are of great interest from the point of view of basic physics, as well as for their possible applications in optoelectronic devices. Among the large number of possible quantum dot materials, we are interested in GaAs/Al𝑥�����Ga1−𝑥�����As/Al0.3Ga0.7As staggered spherical core–shell–shell quantum dots. Here, we theoretically report, working within the effective mass approximation, on the effect of externally applied magnetic and electric fields, as well as hydrostatic pressure on the system. The main findings are that the magnetic field and the hydrostatic pressure slightly change the studied properties, while the electric field significantly modify both the peak position and the magnitude of the absorption coefficient, leading to an optical response for intraband transitions in the terahertz range of the electromagnetic spectrum.