Optical properties of spherical quantum dot in the presence of donor impurity under the magnetic field

AL E. B., Kasapoglu E., Sari H., Sokmen I.

PHYSICA B-CONDENSED MATTER, vol.613, 2021 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 613
  • Publication Date: 2021
  • Doi Number: 10.1016/j.physb.2021.412874
  • Journal Name: PHYSICA B-CONDENSED MATTER
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Chemical Abstracts Core, Communication Abstracts, INSPEC, Metadex, Civil Engineering Abstracts
  • Keywords: Spherical quantum dot, Magnetic field, Donor impurity, Optical absorption, REFRACTIVE-INDEX CHANGES, 3RD HARMONIC-GENERATION, ABSORPTION-COEFFICIENTS, SOLAR-CELLS, RECTIFICATION, PRESSURE, LASER, GAAS/ALGAAS, TEMPERATURE, RASHBA
  • Dokuz Eylül University Affiliated: Yes

Abstract

In this study, the binding energies of an on-center and off-center hydrogenic donor impurity in a spherical quantum dot with finite confinement potential under an applied external magnetic field are investigated in detail by using the matrix diagonalization method in the effective mass approximation. Depending on the calculated energies and wave functions, the linear, third-order nonlinear and total optical absorption coefficients between the ground and several excited states are examined by the iterative method in the compact density matrix approximation for the two-level system. The combined effect of donor position, magnetic field and dot size on binding energies and optical absorption coefficients is observed. The results show that these effects cause significant changes on donor binding energy and optical absorption coefficients.