Optical response in a laser-driven quantum pseudodot system

Kilic D. G., Sakiroglu S., Ungan F., Yesilgul U., Kasapoglu E., Sari H., ...Daha Fazla

PHYSICA B-CONDENSED MATTER, cilt.509, ss.10-15, 2017 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 509
  • Basım Tarihi: 2017
  • Doi Numarası: 10.1016/j.physb.2016.12.031
  • Dergi Adı: PHYSICA B-CONDENSED MATTER
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.10-15
  • Anahtar Kelimeler: Quantum dot, Intense laser field, Nonlinear optics, REFRACTIVE-INDEX CHANGES, ABSORPTION-COEFFICIENTS, INTENSE LASER, MAGNETIC-FIELDS, HYDROGENIC IMPURITY, DONOR IMPURITIES, ELECTRIC-FIELD, DOT, RADIATION, WELL
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

We investigate theoretically the intense laser-induced optical absorption coefficients and refractive index changes in a two-dimensional quantum pseudodot system under an uniform magnetic field. The effects of non-resonant, monochromatic intense laser field upon the system are treated within the framework of high-frequency Floquet approach in which the system is supposed to be governed by a laser-dressed potential. Linear and nonlinear absorption coefficients and relative changes in the refractive index are obtained by means of the compact-density matrix approach and iterative method. The results of numerical calculations for a typical GaAs quantum dot reveal that the optical response depends strongly on the magnitude of external magnetic field and characteristic parameters of the confinement potential. Moreover, we have demonstrated that the intense laser field modifies the confinement and thereby causes remarkable changes in the linear and nonlinear optical properties of the system.