Optical Absorption and Electroabsorption Related to Electronic and Single Dopant Transitions in Holey Elliptical GaAs Quantum Dots


Alejandro Vinasco J., Alejandro Londono M., Leon Restrepo R., Eduardo Mora-Ramos M., Feddi E. M. , Radu A., ...More

PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, vol.255, no.4, 2018 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 255 Issue: 4
  • Publication Date: 2018
  • Doi Number: 10.1002/pssb.201700470
  • Title of Journal : PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS

Abstract

The electron states in a holey elliptically shaped GaAs quantum dot are investigated within the effective mass scheme with the use of the adiabatic approximation and the finite element method. The effects of a donor impurity center and an applied electric field are particularly taken into account. Electron-impurity energies are reported as functions of both the geometry of the quantum dot and the applied field intensity, whereas temperature effects are also included. The analysis of electron-impurity intersubband transitions allows the investigation of the light absorption response of the system.