Third-order nonlinear optical response of colloidal gold nanoparticles prepared by sputtering deposition

被引：26
作者：
Castro, Hemerson P. S. [1 ]
Wender, Heberton [2 ,3 ]
Alencar, Marcio A. R. C. [1 ]
Teixeira, Sergio R. [4 ]
Dupont, Jairton [5 ]
Hickmann, Jandir M. [1 ]
机构：
[1] Univ Fed Alagoas, Opt & Mat Grp, OPTMA, BR-57061970 Maceio, Brazil
[2] CNPEM, Brazilian Synchrotron Natl Lab LNLS, BR-13083970 Campinas, SP, Brazil
[3] Univ Fed Mato Grosso do Sul, Dept Phys, BR-79070900 Campo Grande, Brazil
[4] Univ Fed Rio Grande do Sul, Inst Phys, BR-91501970 Porto Alegre, RS, Brazil
[5] Univ Fed Rio Grande do Sul, Inst Chem, Lab Mol Catalysis, BR-91501970 Porto Alegre, RS, Brazil
来源：
JOURNAL OF APPLIED PHYSICS | 2013年 / 114卷 / 18期
关键词：
HIGH-REPETITION-RATE; SILVER NANOPARTICLES; AU NANOPARTICLES; LASER-ABLATION; IONIC LIQUID; SUSCEPTIBILITY; SCATTERING;
D O I：
10.1063/1.4831679
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The nonlinear optical responses of gold nanoparticles dispersed in castor oil produced by sputtering deposition were investigated, using the thermally managed Z-scan technique. Particles with spherical shape and 2.6 nm of average diameter were obtained and characterized by transmission electron microscopy and small angle X-ray scattering. This colloid was highly stable, without the presence of chemical impurities, neither stabilizers. It was observed that this system presents a large refractive third-order nonlinear response and a negligible nonlinear absorption. Moreover, the evaluation of the all-optical switching figures of merit demonstrated that the colloidal nanoparticles prepared by sputtering deposition have a good potential for the development of ultrafast photonic devices. (C) 2013 AIP Publishing LLC.
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页数：7
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