Plasmonic modes of annular nanoresonators imaged by spectrally resolved cathodoluminescence

被引：61

作者：

Hofmann, Carrie E. ^{[1
]}

Vesseur, Ernst Jan R. ^{[2
]}

Sweatlock, Luke A. ^{[1
]}

Lezec, Henri J. ^{[1
,3
]}

Garcia de Abajo, F. Javier ^{[4
]}

Polman, Albert ^{[1
,2
]}

Atwater, Harry A. ^{[1
,2
]}

机构：

[1] CALTECH, Thomas J Watson Lab Appl Phys, Pasadena, CA 91125 USA

[2] FOM, Inst Atom & Mol Phys, Ctr Nanophoton, NL-1098 SJ Amsterdam, Netherlands

[3] Ctr Natl Rech Sci, F-75794 Paris 16, France

[4] CSIC, Inst Opt, Madrid 28006, Spain

来源：

NANO LETTERS | 2007年 / 7卷 / 12期

关键词：

D O I：

10.1021/nl071789f

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report the observation of plasmonic modes of annular resonators in nanofabricated Ag and Au surfaces that are imaged by spectrally resolved cathodoluminescence. A highly focused 30 keV electron beam is used to excite localized surface plasmons that couple to collective resonant modes of the nanoresonators. We demonstrate unprecedented resolution of plasmonic mode excitation and by combining these observations with full-field simulations find that cathodoluminescence in plasmonic nanostructures is most efficiently excited at positions corresponding to antinodes in the modal electric field intensity.

引用

页码：3612 / 3617

页数：6

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