The influence of illumination on two-photon absorption of quantum dots

被引：2
|
作者：
Zhou, Zhiqiang [1 ]
Cong, Jiawei [1 ]
Yao, Hongbing [1 ]
Fu, Yonghong [1 ]
Ren, Naifei [1 ]
机构：
[1] Jiangsu Univ, Sch Mech Engn, Zhenjiang 212013, Peoples R China
来源：
JOURNAL OF NONLINEAR OPTICAL PHYSICS & MATERIALS | 2018年 / 27卷 / 03期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
Two-photon absorption; quantum dots; enhancement; illumination; optical limiting; CDTE NANOCRYSTALS; PHOTOLUMINESCENCE; NANOPARTICLES; SPECTROSCOPY;
D O I：
10.1142/S0218863518500315
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The influence of illumination with 365 nm ultraviolet light on two-photon absorption (TPA) of aqueous Co2+- doped CdTe (CdTe:Co) quantum dots (QDs) is studied. The results show that with the increase of illumination time, the TPA cross section of the CdTe:Co QDs increases. The experimental results suggest that this enhancement is due to the reduction of surface nonradiative traps which is consistent with the formation of CdS shell on the surface of CdTe:Co QDs. Meanwhile, the results indicate that aqueous CdTe:Co QDs have good optical limiting and optical stabilization performances. This provides a strategy of TPA enhancement by illumination.
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页数：9
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