Nonlinear optical properties of core shell type II quantum dot structures
| Autor: | Erdem Elibol, Hamdi Şükür Kiliç, Yasemin Gündoğdu, Musa Çadırcı |
|---|---|
| Přispěvatelé: | [Belirlenecek] |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Photoluminescence CdSe/CdTe Femtosecond Z-scan Absorption Cross-Section Shell (structure) 02 engineering and technology Cdte Type-II quantum dots 01 natural sciences Two-photon absorption Molecular physics law.invention 010309 optics 2-Photon Absorption Size law 0103 physical sciences Electrical and Electronic Engineering Absorption (electromagnetic radiation) Photodetectors 021001 nanoscience & nanotechnology Laser Cdse Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Nanocrystal Quantum dot Femtosecond 0210 nano-technology |
| Popis: | In 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 zscan experimental set-up are used to determine two photon absorption coefficient (beta-10(-12) cm/W) and nonlinear optical Kerr coefficient (n(2)-10(-20) cm(2)/W. The imaginary and real parts of third order susceptibility (X-(3)) were calculated based on beta and n(2) 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. Duzce University Scientific Research Project (DUBAP)Duzce University [2017.06.03.592]; Selcuk University Scientific Research Project (BAP)Selcuk University [13301022] Duzce University Scientific Research Project (DUBAP) Coordination for the support with the project number of 2017.06.03.592.; Selcuk University Scientific Research Project (BAP) Coordination for the support with the number 13301022 project,; Selcuk University, High Technology Research and Application Center (IL-TEK) and SULTAN Center for infrastructures. WOS:000550261800022 2-s2.0-85082662739 |
| Databáze: | OpenAIRE |
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