Nonlinear optical properties of core shell type II quantum dot structures

被引：22

作者：

Cadirci, Musa ^{[1
]}

Gundogdu, Yasemin ^{[2
,5
]}

Elibol, Erdem ^{[1
]}

Kilic, Hamdi Sukur ^{[3
,4
,5
]}

机构：

[1] Duzce Univ, Dept Elect & Elect Engn, Duzce, Turkey

[2] Selcuk Univ, Kadinhani Faik Icil Vocat High Sch, Dept Elect & Energy, TR-42031 Selcuklu, Konya, Turkey

[3] Selcuk Univ, Fac Sci, Dept Phys, TR-42031 Selcuklu, Konya, Turkey

[4] Selcuk Univ, Directorate High Technol, Res & Applicat Ctr, TR-42031 Selcuklu, Konya, Turkey

[5] Selcuk Univ, Directorate Laser Induced Proton Therapy, Applicat & Res Ctr, TR-42031 Selcuklu, Konya, Turkey

来源：

OPTICS AND LASER TECHNOLOGY | 2020年 / 128卷

关键词：

CdSe/CdTe; Type-II quantum dots; Femtosecond Z-scan; ABSORPTION CROSS-SECTION; 2-PHOTON ABSORPTION; CDSE; PHOTODETECTORS; SIZE; CDTE;

D O I：

10.1016/j.optlastec.2020.106246

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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.

引用

页数：6

共 40 条

[1] Two-photon absorption cross section measurements of various two-photon initiators for ultrashort laser radiation applying the Z-scan technique [J].