Tunable Nonlinear Optical Response in Core/Shell Quantum Dots via Dielectric-Mediated Quantum Confinement

Zeiri N., Cherni A., Dehdashti Jahromi H., BAŞER P., Said M., Murshed M., ...Daha Fazla

Optics Communications, cilt.595, 2025 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 595
  • Basım Tarihi: 2025
  • Doi Numarası: 10.1016/j.optcom.2025.132382
  • Dergi Adı: Optics Communications
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, INSPEC, DIALNET
  • Anahtar Kelimeler: CdS/ZnS core/shell quantum dots, Dielectric environment, Hydrogenic donor impurity, Nonlinear optical rectification, Nonlinear optical susceptibility, Photonic devices
  • Sivas Cumhuriyet Üniversitesi Adresli: Evet

Özet

The precise control of nonlinear optical properties in nanostructures is vital for advancing photonic and optoelectronic device technologies. While quantum confinement and external fields are well-established tuning mechanisms, the influence of the surrounding dielectric matrix remains underexplored. Here, we present a theoretical investigation of CdS/ZnS core/shell quantum dots containing a central hydrogenic donor impurity, embedded in various dielectric environments and subjected to external electric fields. Our unified framework reveals that the dielectric mismatch between the nanostructure and its matrix can enhance or suppress the nonlinear optical rectification coefficient by over 100 %, fundamentally altering electron confinement and optical response. These results establish the dielectric environment as an active design parameter, offering a new axis of control for engineering nonlinear optical properties in quantum dots. This insight opens pathways for the tailored design of materials for terahertz, ultrafast photonic, and optoelectronic applications.