Measurement of the third order optical nonlinearities of graphene quantum dots in water at 355 nm, 532 nm and 1064 nm

被引：9
|
作者：
Wang, Hongzhen [1 ]
Ciret, Charles [1 ]
Cassagne, Christophe [1 ]
Boudebs, Georges [1 ]
机构：
[1] UNIV Angers, SFR MATRIX, EA 4464, Lab Photon Angers,LPHIA, 2 Blvd Lavoisier, F-49045 Angers, France
来源：
OPTICAL MATERIALS EXPRESS | 2019年 / 9卷 / 02期
关键词：
SUSCEPTIBILITY; NANOPARTICLES; OXIDE;
D O I：
10.1364/OME.9.000339
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The nonlinear responses of the suspension of graphene quantum dots (GQDs) in water are investigated at 355 nm. 532 nm and 1064 nm in the picosecond regime. The third-order nonlinear (NL) refractive index and the NL absorption coefficients are determined. We found that only under UV illumination is the NL response large. Furthermore. the NL refractive index and the saturable absorption are estimated for a single nanoparticle constituting the GQDs through a simple model. The obtained value of the Kerr coefficient is in the order of magnitude of that found in bulk materials and three orders of magnitude lower with an opposite sip' than that found for the monolayer graphene. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
引用
收藏
页码：339 / 351
页数：13
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