Third order nonlinear optical properties of CdTe/CdSe Quasi Type-II Colloidal Quantum Dots

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dc.authoridGundogdu, Yasemin/0000-0003-2020-9533
dc.contributor.authorGundogdu, Yasemin
dc.contributor.authorKilic, Hamdi Sukur
dc.contributor.authorCadirci, Musa
dc.date.accessioned2021-12-01T18:48:51Z
dc.date.available2021-12-01T18:48:51Z
dc.date.issued2021
dc.department[Belirlenecek]en_US
dc.description.abstractCore/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 (beta) 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.en_US
dc.description.sponsorshipSelcuk University Scientific Research Project (BAP) Coordination [13301022]; Duzce University Scientific Research Project Coordination (DUBAP)Duzce Universityen_US
dc.description.sponsorshipAuthors kindly would like to thank; Selcuk University Scientific Research Project (BAP) Coordination for the support with the project number of 13301022.; -Selcuk University, High Technology Research and Application Center (ILTEK) and SULTAN Center for providing their infrastructures.; -Duzce University Scientific Research Project Coordination (DUBAP) for their support.en_US
dc.identifier.doi10.1016/j.optmat.2021.110956
dc.identifier.issn0925-3467
dc.identifier.issn1873-1252
dc.identifier.scopus2-s2.0-85101760967en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org/10.1016/j.optmat.2021.110956
dc.identifier.urihttps://hdl.handle.net/20.500.12684/10618
dc.identifier.volume114en_US
dc.identifier.wosWOS:000651358400006en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.relation.ispartofOptical Materialsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectNonlinear optical parametersen_US
dc.subjectCoreen_US
dc.subjectshell quantum dotsen_US
dc.subjectZ scanen_US
dc.subjectAbsorption Cross-Sectionen_US
dc.subject2-Photon Absorptionen_US
dc.subjectCdseen_US
dc.subjectCdteen_US
dc.subjectSizeen_US
dc.subjectPhotodetectorsen_US
dc.titleThird order nonlinear optical properties of CdTe/CdSe Quasi Type-II Colloidal Quantum Dotsen_US
dc.typeArticleen_US

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