Near-Field Analysis of Bright and Dark Modes on Plasmonic Metasurfaces Showing Extraordinary Suppressed Transmission

被引：8

作者：

Dobmann, Sabine ^{[1
,2
]}

Kriesch, Arian ^{[1
,2
]}

Ploss, Daniel ^{[1
,2
]}

Peschel, Ulf ^{[1
,2
]}

机构：

[1] Friedrich Alexander Univ Erlangen Nuremberg FAU, Inst Opt Informat & Photon, D-91058 Erlangen, Germany

[2] Friedrich Alexander Univ Erlangen Nuremberg FAU, Erlangen Grad Sch Adv Opt Technol, D-91058 Erlangen, Germany

来源：

ADVANCED OPTICAL MATERIALS | 2014年 / 2卷 / 10期

关键词：

SPP; EOST; NSOM; metasurfaces; anisotropy; plasmonics; OPTICAL MICROSCOPY; SUBWAVELENGTH HOLES; SURFACE-PLASMONS; METAL-FILMS; APERTURE PROBES; BROAD-BAND; LIGHT; METAMATERIALS; ARRAYS; THIN;

D O I：

10.1002/adom.201400237

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Plasmonic metasurfaces are investigated that consist of a sub-wavelength line pattern in an ultrathin (approximate to 10 nm) silver film, designed for extraordinary suppressed transmission (EOST) in the visible spectral range. Measurements with a near-field scanning optical microscope (NSOM) demonstrate that far-field irradiation resonantly excites antenna-like (bright) modes that are localized on the metal ridges. The re-radiation of these modes into the far-field interferes destructively with the transmitted wave, thus suppressing transmission almost completely. In contrast, a second type of mode, bound (dark) surface plasmon polaritons (SPPs) launched from an NSOM tip, propagates well across the metasurface, preferentially perpendicular to the grating lines.

引用

页码：990 / 999

页数：10

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