Unidirectional enhanced spontaneous emission with metallo-dielectric optical antenna

被引：2

作者：

Shen, Hongming ^{[1
]}

Lu, Guowei ^{[1
,2
]}

He, Yingbo ^{[1
]}

Cheng, Yuqing ^{[1
]}

Gong, Qihuang ^{[1
,2
]}

机构：

[1] Peking Univ, Dept Phys, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China

[2] Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China

来源：

OPTICS COMMUNICATIONS | 2017年 / 395卷

基金：

中国国家自然科学基金;

关键词：

Spontaneous emission; Unidirectional; Metallo-dielectric antenna; Plasmonic enhanced; SINGLE; SCATTERING; LIGHT;

D O I：

10.1016/j.optcom.2015.08.068

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

metallo-dielectric system consisted of two coupled metallic nanoparticles embedded in a planar dielectric antenna is proposed to control the light emission from a localized emitter. Such design integrates the advantages of planar dielectric antenna and plasmonic antenna such as highly localized excitation enhancement, emission direction control, and high collection efficiency. For specific configurations, the antenna can achieve unidirectional and plasmon-enhanced emission from single emitters, simultaneously presenting remarkable collection efficiency up to 96%. We show that the unidirectional effect is mainly determined by the plasmon coupling effect of the plasmonic dimer. The dependences of directivity property on the antenna geometry and emitter's position are also discussed in detail. These findings provide a promising route to realize novel optical devices involving directional and surface enhanced spontaneous emission, e.g. bright single-photon sources with high collection efficiency. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：133 / 138

页数：6

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