Anisotropy dependence of the optical response in an impurity doped quantum dot under intense laser field

Aydin F., SARİ H., KASAPOĞLU E., Sakiroglu S., Sokmen I.

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, cilt.114, 2019 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 114
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1016/j.physe.2019.113566
  • Dergi Adı: PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Anahtar Kelimeler: Quantum dot impurity intense laser field, DONOR IMPURITY, COULOMB ISLAND, ELECTRIC-FIELD, STATES
  • Sivas Cumhuriyet Üniversitesi Adresli: Evet

Özet

In the present work, we are interested in calculating anisotropy dependence of the optical response in an ellipsoidal quantum dot with a hydrogenic impurity in the presence of high-frequency intense laser field within the framework of the effective mass approximation. The effects of the anisotropy of the system and laser field intensity on the energy levels and the respective impurity binding energies are calculated. It is shown that the electrostatic interaction between the electron and the impurity atom becomes the weakest when the structure has a spherical symmetry and in contrast to the is-like state, the binding energy of the 2p(z)-like state increases with the laser field intensity for all values of the anisotropy parameter considered. The results show that the anisotropy degree plays a fundamental role in determining the optical response of the ellipsoidal quantum dot.