Theoretical investigation of laser field effect on nonlinear optical properties of quantum dots

Durak S., ŞAKİROĞLU S.

PHYSICA B-CONDENSED MATTER, vol.650, 2023 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 650
  • Publication Date: 2023
  • Doi Number: 10.1016/j.physb.2022.414575
  • 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: Intense laser field, Nonlinear optics, Quantum dot
  • Dokuz Eylül University Affiliated: Yes

Abstract

In this work, we have theoretically investigated the effects of a high-frequency intense laser field on the nonlinear optical properties of a two-dimensional Gaussian quantum dot system. A non-resonant monochro-matic intense laser field with circular polarization applied to the system is considered in the framework of a non-perturbative approach. The nonlinear optical properties of the system have been investigated by using the compact-density matrix approach and iterative procedure. The laser field effect on the linear and the third -order nonlinear absorption coefficients and refractive index changes have been examined. Results reveal that the optical characteristics of the two-dimensional Gaussian quantum dot system are considerably influenced by the strength of the intense laser field in addition to structure parameters.