Analyzing second and third harmonic generation in multilayered quantum dots: Effects of alloy composition and layer structure

Fakkahi A., BAŞER P., Arraoui R., Jaouane M., Ed-Dahmouny A., Sali A., ...Daha Fazla

Materials Today Communications, cilt.46, 2025 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 46
  • Basım Tarihi: 2025
  • Doi Numarası: 10.1016/j.mtcomm.2025.112783
  • Dergi Adı: Materials Today Communications
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex, INSPEC
  • Anahtar Kelimeler: Finite element method, Multilayered quantum dot, Optical properties, Second harmonic generation, Third harmonic generation, Transition energy
  • Sivas Cumhuriyet Üniversitesi Adresli: Evet

Özet

The study explores the nonlinear optical properties of multilayered quantum dots (QDs) focusing on second and third harmonic generation (SHG and THG). This research investigates the influence of Aluminum alloy composition, and layer dimensions on the intensity of SHG and THG. A comprehensive finite element method (FEM) is employed to model the electronic states and optical responses of multilayered QDs. Variations in Aluminum concentration across regions significantly affect the electronic band structure and, as a result, the nonlinear optical properties. Additionally, the dimensions of each layer (core, shell, and well) within the QDs are varied to assess their impact on the second and third harmonic generation. The obtained results demonstrate that careful tuning of alloy composition, and layer dimensions can optimize the SHG and THG in multilayered quantum dots. This study provides valuable insights into the design and engineering of quantum dot-based devices for advanced photonic applications, paving the way for improved performance in nonlinear optical systems.