Large third-order nonlinear refractive index coefficient based on gold nanoparticle aggregate films

被引：28

作者：

Bai, Songang ^{[1
]}

Li, Qiang ^{[1
]}

Zhang, Han ^{[2
,3
]}

Chen, Xingxing ^{[1
]}

Luo, Si ^{[1
]}

Gong, Hanmo ^{[1
]}

Yang, Yuanqing ^{[1
]}

Zhao, Ding ^{[1
]}

Qiu, Min ^{[1
,4
]}

机构：

[1] Zhejiang Univ, Coll Opt Sci & Engn, State Key Lab Modern Opt Instrumentat, Hangzhou 310027, Zhejiang, Peoples R China

[2] Shenzhen Univ, SZU NUS Collaborat Innovat Ctr Optoelect Sci & Te, Shenzhen 518060, Peoples R China

[3] Shenzhen Univ, Key Lab Optoelect Devices & Syst, Minist Educ & Guangdong Prov, Shenzhen 518060, Peoples R China

[4] Royal Inst Technol KTH, Sch Informat & Commun Technol, S-16440 Kista, Sweden

来源：

APPLIED PHYSICS LETTERS | 2015年 / 107卷 / 14期

基金：

国家教育部博士点专项基金资助; 瑞典研究理事会; 中国国家自然科学基金;

关键词：

AU TRIANGULAR NANOPRISM; Z-SCAN MEASUREMENT; OPTICAL PROPERTIES; RESONANCES; DIPOLE;

D O I：

10.1063/1.4931759

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Au nanoparticles show large third-order nonlinear effect and ultra-fast response. Here a high nonlinear aggregate film based on self-assembled gold nanoparticles is reported and its third-order nonlinear refractive index coefficient is measured by Z-scan experiment. The third-order nonlinear refractive index coefficient of the Au nanoparticle aggregate film (gamma(1) = 9.2 x 10(-9) cm(2)/W) is found to be larger than that of an 8-nm-thick sputtered Au film (gamma(2)= 6.5 x 10(-9) cm(2)/W). This large nonlinear effect can be attributed to the strong field enhancement due to localized plasmon resonances between Au nanoparticles. The result shows that the self-assembled Au nanoparticle aggregate film could be a promising candidate as a third-order nonlinear optical material. (C) 2015 AIP Publishing LLC.

引用

页数：5

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