Plasmon-enhanced second-harmonic generation from ionic self-assembled multilayer films

被引：78

作者：

Chen, Kai ^{[1
]}

Durak, Cemil ^{[1
]}

Heflin, J. R. ^{[1
]}

Robinson, Hans D. ^{[1
]}

机构：

[1] Virginia Polytech Inst & State Univ, Dept Phys, Blacksburg, VA 24061 USA

来源：

NANO LETTERS | 2007年 / 7卷 / 02期

关键词：

D O I：

10.1021/nl062090x

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We have demonstrated large enhancements of the effective second-order nonlinear susceptibility (chi((2))) of ionic self-assembled multilayer (ISAM) films, causing a film with just 3 bilayers to be optically equivalent to a 700-1000 bilayer film. This was accomplished by using nanosphere lithography to deposit silver nanoparticles on the ISAM film, tuning the geometry of the particles to make their plasmonic resonances overlap the frequency of optical excitation. An enhancement in the efficiency of second harmonic generation (SHG) by as much as 1600 times was observed. Even though this is already a large value, we suggest that further refinements of the techniques are expected to lead to additional enhancements of similar or larger magnitude.

引用

页码：254 / 258

页数：5

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