RESONANT Z-SCAN MEASUREMENT OF NON-LINEAR PROPERTIES OF COLLOIDAL LEAD SULFIDE QUANTUM DOTS

被引：0

作者：

Skurlov, Ivan ^{[1
]}

Ponomareva, Evgenia ^{[1
]}

Putilin, Sergey ^{[1
]}

Popov, Aleksei ^{[1
]}

Dubavik, Aliaksei ^{[1
]}

Tsypkin, Anton ^{[1
]}

Litvin, Aleksandr ^{[1
]}

机构：

[1] ITMO Univ, St Petersburg, Russia

来源：

10TH ANNIVERSARY INTERNATIONAL CONFERENCE ON NANOMATERIALS - RESEARCH & APPLICATION (NANOCON 2018 (R)) | 2019年

关键词：

Nanocrystals; quantum dots; lead sulfide; z-scan; non-linear refraction; OPTICAL PROPERTIES;

D O I：

暂无

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Studying the nonlinearities in the resonant mode one may face thermo-optical effects due to sample overheating, occurring upon exposure to high-frequency repetition rate probing pulse. If present, thermooptical contribution to the refractive index are extremely hard to separate from the electronic contribution. In order to obtain purely electronic non-linear change in refractive index and to avoid thermal effects we modify classic Z-scan method to operate with low probing laser pulse repetition rate of 1 Hz. In our work, we present results of a Z-scan measured non-linear refraction coefficient of colloidal PbS QDs of different sizes free from thermal contribution. Our measured values of nonlinear refractive index is in order of 10(-16) cm(2)/W and independent on the QD concentration in the solution.

引用

页码：36 / 40

页数：5

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