The third-order nonlinear optical properties of gold nanoparticles-methylene blue conjugation

被引：10
|
作者：
Shokoufi, Nader [1 ]
Hajibaba, Shafigh Nouri [1 ]
机构：
[1] Chem & Chem Engn Res Ctr Iran Ccerci, Dept Green Technol, Tehran, Iran
来源：
OPTICS AND LASER TECHNOLOGY | 2019年 / 112卷
关键词：
Nonlinear optics; Z-scan method; Nonlinear refractive index; Nonlinear absorption coefficient; Organic dye; Metal nanoparticles; Z-SCAN MEASUREMENTS; SENSITIVE MEASUREMENT; ABSORPTION PROPERTIES; PHOTODYNAMIC THERAPY; 2-PHOTON ABSORPTION; DATA-STORAGE; REFRACTION; DYE; GLASSES; GROWTH;
D O I：
10.1016/j.optlastec.2018.09.058
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Third-order nonlinear properties of a thiazine dye (methylene blue (MB)) and a plasmonic nanoparticle (gold nanoparticles (GNPs)) have been studied by Z-scan method with a 50 mW continues wave (CW) diode pumped solid state laser (DPSSL) operating at 532nm. The nonlinear parameters (nonlinear refractive (NLR) index (n(2)) and nonlinear absorption (NLA) coefficient (beta)) are determined. The mechanism of the observed NLA and nonlinear refraction is attributed respectively to reverse saturable absorption (RSA) and thermal nonlinear effects. The magnitude of the measured NLR index (n(2)) and NLA coefficient (beta) are founded to be the order of 10(-8)cm(2)/W and 10(-4)cm/W respectively. The effect of MB and GNPs on each other has been studied. Z-scan experiments for GNPs-MB conjugation shows noticeable increase in nonlinear parameters.
引用
收藏
页码：198 / 206
页数：9
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