Influence of external fields on the exciton binding energy and interband absorption in a double inverse parabolic quantum well

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Yücel M. B., Şakiroğlu S., Sari H., Duque C., Kasapoğlu E.

Physica E: Low-Dimensional Systems and Nanostructures, cilt.144, 2022 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 144
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1016/j.physe.2022.115433
  • Dergi Adı: Physica E: Low-Dimensional Systems and Nanostructures
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED)
  • Anahtar Kelimeler: Double inverse parabolic quantum well, Exciton absorption, Exciton binding energy
  • Akdeniz Üniversitesi Adresli: Evet

Özet

Ground-state binding energy and optical absorption coefficient of exciton in a symmetric double inverse parabolic quantum well system in the presence of external electric and magnetic fields are investigated theoretically. Numerical calculations have been carried out with the variational technique considering the single-band effective mass approximations. Results reveal that the excitonic binding energy and interband optical absorption depend on significantly on the geometrical and structural parameters defining carriers’ double inverse parabolic confinement potential, the aluminum concentration at the well center, the electric field, and the magnetic field. The exciton binding energy is a decreasing (increasing) function of the electric field (magnetic field). The increase in aluminum concentration creates a blueshift at the resonance peak positions. As a result, the tunability of the excitonic effects is expected to be of importance in developing stable and high-efficiency nanoscale excitonic optoelectronic devices.