Impurity-modulated optical response of a disc-shaped quantum dot subjected to laser radiation

Kilic D. G., Sakiroglu S., Kasapoglu E., Sari H., Sokmen I.

PHOTONICS AND NANOSTRUCTURES-FUNDAMENTALS AND APPLICATIONS, vol.38, 2020 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 38
  • Publication Date: 2020
  • Doi Number: 10.1016/j.photonics.2019.100748
  • Journal Name: PHOTONICS AND NANOSTRUCTURES-FUNDAMENTALS AND APPLICATIONS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, PASCAL, Aerospace Database, Communication Abstracts, Compendex, INSPEC
  • Keywords: Quantum dot, Tcrahertz laser, Optical properties, Hydrogenic impurity, ELECTROMAGNETICALLY INDUCED TRANSPARENCY, REFRACTIVE-INDEX CHANGES, INTENSE LASER, ABSORPTION COEFFICIENTS, ELECTRONIC-STRUCTURE, HYDROGENIC IMPURITY, DONOR IMPURITIES, ATOMIC-HYDROGEN, FIELD, SUPERINTENSE
  • Dokuz Eylül University Affiliated: Yes

Abstract

We report the optical properties of a laser-driven two-dimensional quantum dot with a hydrogenic impurity exposed to a magnetic field. The effective mass approximation is used to bring out the effect of an intense laser field, resulting in dressed Coulomb and confinement potentials, on the one-electron energy levels and wave functions. The results obtained suggest that the action of the laser field leads to crucial changes in the energy spectra of the system and the impurity binding energy. Furthermore, the position and the height of the resonant peaks of the absorption coefficients and refractive index changes depend strongly not only on the geometrical confinement strength but also on the magnetic field and laser radiation through the "laser-dressed" potential.