Drude Relaxation Rate in Grained Gold Nanoantennas

被引：171
作者：
Chen, Kuo-Ping
Drachev, Vladimir P. [1 ]
Borneman, Joshua D.
Kildishev, Alexander V.
Shalaev, Vladimir M.
机构：
[1] Purdue Univ, Birck Nanotechnol Ctr, W Lafayette, IN 47907 USA
来源：
NANO LETTERS | 2010年 / 10卷 / 03期
关键词：
Plasmonics; nanoantennas; electron relaxation race; grain structure; annealing; OPTICAL-CONSTANTS; GROWTH; NANOPARTICLES; FILM; PARTICLES; METALS; FIELD;
D O I：
10.1021/nl9037246
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The effect of grain boundaries on the electron relaxation rate is significant even for large area noble metal films and more so for plasmonic nanostructures. Optical spectroscopy and X-ray diffraction show a substantial improvement in plasmon resonance quality for square-particle nanoantennas after annealing due to an enlarged grain size from 22 to 40 nm and improved grain boundaries described by the electron relfection coefficient. The electron relaxation rate due to the grains is shown to decrease by a factor of 3.2.
引用
收藏
页码：916 / 922
页数：7
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