Directional out-coupling of light from a plasmonic nanowire-nanoparticle junction

被引：18

作者：

Singh, Danveer ^{[1
]}

Dasgupta, Arindam ^{[1
]}

Aswathy, V. G. ^{[1
]}

Tripathi, Ravi P. N. ^{[1
]}

Kumar, G. V. Pavan ^{[1
]}

机构：

[1] Indian Inst Sci Educ & Res, Photon & Opt Nanoscopy Lab, Pune 411008, Maharashtra, India

来源：

OPTICS LETTERS | 2015年 / 40卷 / 06期

关键词：

SILVER NANOWIRES; WAVE-GUIDES; DEVICES;

D O I：

10.1364/OL.40.001006

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We experimentally show how a single Ag nanoparticle (NP) coupled to an Ag nanowire (NW) can convert propagating surface plasmon polaritons to directional photons. By employing dual-excitation Fourier microscopy with spatially filtered collection-optics, we show single-and dual-directional out-coupling of light from NW-NP junction for plasmons excited through glass-substrate and air-superstrate. Furthermore, we show NW-NP junction can influence the directionality of molecular-fluorescence emission, thus functioning as an optical antenna. The results discussed herein may have implications in realizing directional single-photon sources and quantum plasmon circuitry. (C) 2015 Optical Society of America

引用

页码：1006 / 1009

页数：4

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