Controlled modification of single colloidal CdSe/ZnS nanocrystal fluorescence through interactions with a gold surface

被引：43

作者：

Vion, Celine ^{[1
,2
]}

Spinicelli, Piernicola ^{[3
]}

Coolen, Laurent ^{[1
,2
]}

Schwob, Catherine ^{[1
,2
]}

Frigerio, Jean-Marc ^{[1
,2
]}

Hermier, Jean-Pierre ^{[3
,4
]}

Maitre, Agnes ^{[1
,2
]}

机构：

[1] Univ Paris 06, INSP, UMR 7588, F-75015 Paris, France

[2] CNRS, INSP, UMR 7588, F-75015 Paris, France

[3] Univ Paris 06, CNRS, Ecole Normale Super, Lab Kastler Brossel,CC74, F-75252 Paris 05, France

[4] Univ Versailles St Quentin en Yvelines, Grp Etud Mat Condensee, UFR Sci, F-78035 Versailles, France

来源：

OPTICS EXPRESS | 2010年 / 18卷 / 07期

关键词：

QUANTUM-DOT FLUORESCENCE; MOLECULE FLUORESCENCE; SPONTANEOUS-EMISSION; METAL; RATES;

D O I：

10.1364/OE.18.007440

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Single colloidal CdSe/ZnS nanocrystals are deposited at various distances from a gold film in order to improve their performance as single-photon sources. Photon antibunching is demonstrated and the experimental curves are accurately fitted by theoretical equations. Emission lifetime and intensity are measured and found in excellent agreement with theoretical values. The various effects of a neighbouring gold film are discussed : interferences of the excitation beam, interferences of the fluorescence light, opening of plasmon and lossy-surface-wave modes, modification of the radiation pattern leading to a modified objective collection efficiency. At 80 nm from the gold film, when using an objective with 0.75 numerical aperture, about a 2.4-fold increase of the detected intensity is evidenced. (C) 2010 Optical Society of America

引用

页码：7440 / 7455

页数：16

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