Unidirectional Emission of a Quantum Dot Coupled to a Nanoantenna

被引：1224

作者：

Curto, Alberto G. ^{[1
]}

Volpe, Giorgio ^{[1
]}

Taminiau, Tim H. ^{[1
]}

Kreuzer, Mark P. ^{[1
]}

Quidant, Romain ^{[1
,2
]}

van Hulst, Niek F. ^{[1
,2
]}

机构：

[1] ICFO, Castelldefels 08860, Barcelona, Spain

[2] ICREA, Barcelona 08015, Spain

来源：

SCIENCE | 2010年 / 329卷 / 5994期

基金：

欧洲研究理事会;

关键词：

SINGLE-MOLECULE FLUORESCENCE; YAGI-UDA ANTENNA; LIGHT; EMITTERS; PATTERN;

D O I：

10.1126/science.1191922

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Nanoscale quantum emitters are key elements in quantum optics and sensing. However, efficient optical excitation and detection of such emitters involves large solid angles because their interaction with freely propagating light is omnidirectional. Here, we present unidirectional emission of a single emitter by coupling to a nanofabricated Yagi-Uda antenna. A quantum dot is placed in the near field of the antenna so that it drives the resonant feed element of the antenna. The resulting quantum-dot luminescence is strongly polarized and highly directed into a narrow forward angular cone. The directionality of the quantum dot can be controlled by tuning the antenna dimensions. Our results show the potential of optical antennas to communicate energy to, from, and between nano-emitters.

引用

页码：930 / 933

页数：4

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