Surface-enhanced emission from single semiconductor nanocrystals

被引：564

作者：

Shimizu, KT ^{[1
]}

Woo, WK ^{[1
]}

Fisher, BR ^{[1
]}

Eisler, HJ ^{[1
]}

Bawendi, MG ^{[1
]}

机构：

[1] MIT, Cambridge, MA 02139 USA

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 11期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1103/PhysRevLett.89.117401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The fluorescence behavior of single CdSe(ZnS) core-shell nanocrystal (NC) quantum dots is dramatically affected by electromagnetic interactions with a rough metal film. Observed changes include a fivefold increase in the observed fluorescence intensity of single NCs, a striking reduction in their fluorescence blinking behavior, complete conversion of the emission polarization to linear, and single NC exciton lifetimes that are >10(3) times faster. The enhanced excited state decay process for NCs coupled to rough metal substrates effectively competes with the Auger relaxation process, allowing us to observe both charged and neutral exciton emission from these NC quantum dots.

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页码：1 / 117401

页数：4

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