Robustness of plasmonic angular momentum confinement in cross resonant optical antennas

被引：10

作者：

Klaer, Peter ^{[1
]}

Razinskas, Gary ^{[2
]}

Lehr, Martin ^{[1
]}

Krewer, Keno ^{[1
]}

Schertz, Florian ^{[1
]}

Wu, Xiao-Fei ^{[2
]}

Hecht, Bert ^{[2
]}

Schoenhense, Gerd ^{[1
]}

Elmers, Hans Joachim ^{[1
]}

机构：

[1] Johannes Gutenberg Univ Mainz, Inst Phys, D-55099 Mainz, Germany

[2] Univ Wurzburg, Inst Phys, D-97074 Wurzburg, Germany

来源：

APPLIED PHYSICS LETTERS | 2015年 / 106卷 / 26期

关键词：

PHOTOEMISSION ELECTRON-MICROSCOPY; NEAR-FIELD; GOLD NANOSTRUCTURES; POLARITONS; DYNAMICS; MODES; LIGHT; PEEM; FILM;

D O I：

10.1063/1.4923242

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Using a combination of photoemission electron microscopy and numerical simulations, we investigated the angular moment transfer in strongly enhanced optical near-fields of artificially fabricated optical antennas. The polarization dependence of the optical near-field enhancement has been measured in a maximum symmetric geometry, i.e., excitation by a normal incident planar wave. Finite-difference time-domain simulations for the realistic antenna geometries as determined by high-resolution electron microscopy reveal a very good agreement with experimental data. The agreement confirms that the geometrical asymmetries and inhomogeneities due to the nanoscale fabrication process preserve the circular polarization in the gap regions with strong near-field enhancement. (C) 2015 AIP Publishing LLC.

引用

页数：5

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