Selective Far-field Addressing of Coupled Quantum Dots in a Plasmonic Nanocavity

Overview

Journal Nat Commun

Specialty Biology

Date 2018 Apr 29

PMID 29704002

Citations 9

Authors

Jianwei Tang

Juan Xia

Maodong Fang

Fanglin Bao

Guanjun Cao

Jianqi Shen

Julian Evans

Sailing He

Affiliations

Soon will be listed here.

Abstract

Plasmon-emitter hybrid nanocavity systems exhibit strong plasmon-exciton interactions at the single-emitter level, showing great potential as testbeds and building blocks for quantum optics and informatics. However, reported experiments involve only one addressable emitting site, which limits their relevance for many fundamental questions and devices involving interactions among emitters. Here we open up this critical degree of freedom by demonstrating selective far-field excitation and detection of two coupled quantum dot emitters in a U-shaped gold nanostructure. The gold nanostructure functions as a nanocavity to enhance emitter interactions and a nanoantenna to make the emitters selectively excitable and detectable. When we selectively excite or detect either emitter, we observe photon emission predominantly from the target emitter with up to 132-fold Purcell-enhanced emission rate, indicating individual addressability and strong plasmon-exciton interactions. Our work represents a step towards a broad class of plasmonic devices that will enable faster, more compact optics, communication and computation.

Citing Articles

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