Scopus
YÖKSİS Eşleşti
Third order nonlinear optical properties of CdTe/CdSe Quasi Type-II Colloidal Quantum Dots
Optical Materials · Nisan 2021
YÖKSİS Kayıtları
Third order nonlinear optical properties of CdTe/CdSe Quasi Type-II Colloidal Quantum Dots
Optical Materials · 2021 SCI-Expanded
DOÇENT YASEMİN GÜNDOĞDU KABAKCI →
Makale Bilgileri
DergiOptical Materials
Yayın TarihiNisan 2021
Cilt / Sayfa114
Scopus ID2-s2.0-85101760967
Özet
Core/shell Colloidal Quantum Dots (CQDs) are of interest for nonlinear photonic applications due to their unique properties. In this work, firstly CdTe/CdSe Quasi Type-II Colloidal Quantum Dots with an average core size of 3.54 nm and four different shell thicknesses (1.8 nm, 2.7 nm, 3.2 nm and 3.8 nm) were synthesized and characterized using UV–Vis spectroscopy and Transmission electron microscopy (TEM). Secondly nonlinear optical properties of these structures were determined using Femtosecond Z-scan method at the wavelength of 800 nm. Measured values for two photons absorption coefficients (β) and nonlinear refractive indices (n2) were found to be on the orders of 10−11 cm/W and 10−16 cm2/W, respectively. In addition, the third order nonlinear optical susceptibility values for these structures were calculated to be on the order of 10−10 esu. Quantum dots with thicker shells exhibited faintly higher nonlinear absorption coefficient and slightly lower third order nonlinear optical susceptibility values compared with that of thinner shells. Furthermore, pump power dependant nonlinear optical properties of core/shell nano-structures were investigated and it is observed that two photons absorption coefficient and the third order nonlinear optical susceptibility are pump dependant, while nonlinear refractive indices does not respond to the pump power.
Yazarlar (3)
1
Yasemin Gündoğdu
2
Hamdi Şükür Kılıç
3
Musa Çadirci
Anahtar Kelimeler
Core/shell quantum dots
Nonlinear optical parameters
Z scan
Kurumlar
Düzce Üniversitesi
Duzce Turkey
Selçuk Üniversitesi
Selçuklu Turkey
Metrikler
17
Atıf
3
Yazar
3
Anahtar Kelime