Unveiling the impact of neighboring oxides: A detailed analysis of second and third harmonic generation in cylindrical ZnS/CdSe core/shell quantum dots

Karakoç M., Naifar A., Bayrak O.

Physica B: Condensed Matter, cilt.701, 2025 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 701
  • Basım Tarihi: 2025
  • Doi Numarası: 10.1016/j.physb.2025.416961
  • Dergi Adı: Physica B: Condensed Matter
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Chemical Abstracts Core, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Anahtar Kelimeler: Dielectric oxides, Harmonic generation, Nonlinear optical properties, Quantum dots
  • Akdeniz Üniversitesi Adresli: Evet

Özet

In this research, we conduct a meticulous theoretical exploration of the microscopic impact of surrounding ZnS/CdSe cylindrical core/shell quantum dots within TiO2 and SiO2 oxides for potential applications in advanced tunneling quantum transport devices. The discrete intra-band localized energy states and their corresponding wave functions are analytically obtained by solving the stationary Schrödinger equation within the framework of the effective mass approximation and density matrix theory. The obtained energy eigenvalues and corresponding wave functions are compared with those derived from the finite difference method, ensuring consistency between the two approaches. Our computational results reveal that the combined effects of quantum and dielectric confinement-arising from geometric modifications (such as shell radius, well width, and height) and the new oxidized environment—significantly influence the energy eigenvalues, dipole matrix elements, and the magnitudes and phases of second-harmonic generation (SHG) and third-harmonic generation (THG).