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
收藏
页码：1006 / 1009
页数：4
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