Surface plasmon interference excited by tightly focused laser beams

被引：158

作者：

Bouhelier, A. ^{[1
]}

Ignatovich, F.

Bruyant, A.

Huang, C.

Francs, G. Colas des

Weeber, J.-C.

Dereux, A.

Wiederrecht, G. P.

Novotny, L.

机构：

[1] Univ Bourgogne, CNRS, UMR, Inst Carnot Bourgogne, F-21078 Dijon, France

[2] Univ Rochester, Inst Opt, Rochester, NY 14627 USA

[3] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA

来源：

OPTICS LETTERS | 2007年 / 32卷 / 17期

关键词：

D O I：

10.1364/OL.32.002535

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We show that interfering surface plasmon polaritons can be excited with a focused laser beam at normal incidence to a plane metal film. No protrusions or holes are needed in this excitation scheme. Depending on the axial position of the focus, the intensity distribution on the metal surface is either dominated by interferences between counterpropagating plasmons or by a two-lobe pattern characteristic of localized surface plasmon excitation. Our experiments can be accurately explained by use of the angular spectrum representation and provide a simple means for locally exciting standing surface plasmon polaritons. (c) 2007 Optical Society of America.

引用

页码：2535 / 2537

页数：3

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