Surface plasmons at single nanoholes in Au films

被引：231
作者：
Yin, L
Vlasko-Vlasov, VK
Rydh, A
Pearson, J
Welp, U
Chang, SH
Gray, SK
Schatz, GC
Brown, DB
Kimball, CW
机构：
[1] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA
[2] Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA
[3] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA
[4] No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA
来源：
APPLIED PHYSICS LETTERS | 2004年 / 85卷 / 03期
关键词：
D O I：
10.1063/1.1773362
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The generation of surface plasmon polaritons (SPPs) at isolated nanoholes in 100 nm thick Au films is studied using near-field scanning optical microscopy. Finite-difference time-domain calculations, some explicitly including a model of the scanning tip, are used to interpret the results. We find the holes act as point-like sources of SPPs and demonstrate that the interference between the SPP and a directly transmitted wave allows determination of the wavelength, phase, and decay length of the SPP. The near-field intensity patterns can be manipulated by varying the angle and polarization of the incident beam. (C) 2004 American Institute of Physics.
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页码：467 / 469
页数：3
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