Mapping Magnetic Near-Field Distributions of Plasmonic Nanoantennas

被引：75

作者：

Denkova, Denitza ^{[1
]}

Verellen, Niels ^{[1
,3
]}

Silhanek, Alejandro V. ^{[1
,4
]}

Valev, Ventsislav K. ^{[1
]}

Van Dorpe, Pol ^{[2
,3
]}

Moshchalkov, Victor V. ^{[1
]}

机构：

[1] Katholieke Univ Leuven, INPAC, B-3001 Louvain, Belgium

[2] Katholieke Univ Leuven, Dept Phys, B-3001 Louvain, Belgium

[3] IMEC, B-3001 Louvain, Belgium

[4] Univ Liege, Dept Phys, B-4000 Sart Tilman Par Liege, Belgium

来源：

ACS NANO | 2013年 / 7卷 / 04期

基金：

英国工程与自然科学研究理事会;

关键词：

optical magnetic field; near-field imaging; surface plasmon resonance; optical nanobar antenna; hollow-pyramid probe; probe-sample coupling; OPTICAL MICROSCOPY; LOCAL DETECTION; RESONANCES; RESOLUTION; LIGHT; NANOSTRUCTURES; FUNDAMENTALS; APERTURE; ANTENNAS; ARRAYS;

D O I：

10.1021/nn305589t

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We present direct experimental mapping of the lateral magnetic near-field distribution in plasmonic nanoantennas using aperture scanning near-field optical microscopy (SNOM). By means of full-field simulations it is demonstrated how the coupling of the hollow-pyramid aperture probe to the nanoantenna induces an effective magnetic dipole which efficiently excites surface plasmon resonances only at lateral magnetic field maxima. This excitation in turn affects the detected light intensity enabling the visualization of the lateral magnetic near-field distribution of multiple odd and even order plasmon modes with subwavelength spatial resolution.

引用

页码：3168 / 3176

页数：9

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