Efficient unidirectional ridge excitation of surface plasmons

被引：105

作者：

Radko, I. P. ^{[1
]}

Bozhevolnyi, S. I. ^{[1
]}

Brucoli, G. ^{[2
,3
]}

Martin-Moreno, L. ^{[2
,3
]}

Garcia-Vidal, F. J. ^{[4
]}

Boltasseva, A. ^{[5
]}

机构：

[1] Univ So Denmark, Inst Sensors Signals & Electrotech, DK-5230 Odense M, Denmark

[2] Univ Zaragoza, CSIC, Inst Ciencia Mat Aragon, E-50009 Zaragoza, Spain

[3] Univ Zaragoza, CSIC, Dept Fis Mat Condensada, E-50009 Zaragoza, Spain

[4] Univ Autonoma Madrid, Dept Fis Teor Mat Condensada, E-28049 Madrid, Spain

[5] Purdue Univ, Sch Elect & Comp Engn, Birck Nanotechnol Ctr, W Lafayette, IN 47907 USA

来源：

OPTICS EXPRESS | 2009年 / 17卷 / 09期

关键词：

POLARITON; LIGHT;

D O I：

10.1364/OE.17.007228

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Using leakage-radiation microscopy, we characterize the efficiency of unidirectional surface-plasmon excitation with periodic (800 nm) arrays of 130-nm-high and 330-nm-wide gold ridges on a thin gold film illuminated with a focused (5-mu m-wide) laser beam. We demonstrate that, at the resonant wavelength of 816 nm, the excitation efficiency of > 0.4 can be obtained with >= 5 ridges by adjusting the beam position. Conducting numerical simulations, we account for the experimental results and calculate the electric-field enhancement achieved near the gold surface. (C) 2009 Optical Society of America

引用

页码：7228 / 7232

页数：5

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