Çadırcı, MusaGündoğdu, YaseminElibol, ErdemKılıç, Hamdi Şükür2020-04-302020-04-3020200030-3992https://dx.doi.org/10.1016/j.optlastec.2020.106246https://hdl.handle.net/20.500.12684/470In this study, CdSe/CdTe Type-II quantum dots (QDs) were synthesized using dropwise method. The core/shell nanocrystals have been characterized by UV–Vis absorption and photoluminescence (PL) spectroscopies, transmission electron microscopy and z-scan technique. Nonlinear properties of each type of quantum dots were studied using femtosecond(fs) z-scan method at 800 nm wavelength with different laser intensities. Fs laser z-scan experimental set-up are used to determine two photon absorption coefficient (? ?10?12 cm/W) and nonlinear optical Kerr coefficient (n2 ? 10?20 cm2/W. The imaginary and real parts of third order susceptibility (X(3)) were calculated based on ? and n2 under different laser intensities for seven different core/shell QDs. Third order susceptibility for CdSe/CdTe type II QDs was found to be about 10?12 esu. © 2020 Elsevier Ltden10.1016/j.optlastec.2020.106246info:eu-repo/semantics/closedAccessCdSe/CdTe; Femtosecond Z-scan; Type-II quantum dotsArticle128Q1