Strong Purcell effect observed in single thick-shell CdSe/CdS nanocrystals coupled to localized surface plasmons

被引：41

作者：

Canneson, D. ^{[1
]}

Mallek-Zouari, I. ^{[1
]}

Buil, S. ^{[1
]}

Quelin, X. ^{[1
]}

Javaux, C. ^{[2
]}

Mahler, B. ^{[2
]}

Dubertret, B. ^{[2
]}

Hermier, J. -P. ^{[1
,3
]}

机构：

[1] Univ Versailles St Quentin En Yvelines, CNRS UMR8635, Grp Etud Mat Condensee, F-78035 Versailles, France

[2] ESPCI, CNRS UMR8213, Lab Phys & Etud Mat, F-75231 Paris, France

[3] Inst Univ France, F-75005 Paris, France

来源：

PHYSICAL REVIEW B | 2011年 / 84卷 / 24期

关键词：

CDSE/ZNS QUANTUM DOTS; EMISSION; BLINKING; FLUORESCENCE; MODES;

D O I：

10.1103/PhysRevB.84.245423

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

High-quality-factor dielectric cavities designed to a nanoscale accuracy are mostly used to increase the spontaneous emission rate of a single emitter. Here we show that the coupling, at room temperature, between thick-shell CdSe/CdS nanocrystals and random metallic films offers a very promising alternative approach. Optical modes confined at the nanoscale induce strong Purcell factors reaching values as high as 60. Moreover, the quantum emission properties can be tailored: strong antibunching or radiative biexcitonic cascades can be obtained with high photon collection efficiency and extremely reduced blinking.

引用

页数：6

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