Spectral Control of Plasmonic Emission Enhancement from Quantum Dots near Single Silver Nanoprisms

被引：224

作者：

Munechika, Keiko ^{[1
]}

Chen, Yeechi ^{[1
]}

Tillack, Andreas F. ^{[1
]}

Kulkarni, Abhishek P. ^{[1
]}

Plante, Ilan Jen-La ^{[1
]}

Munro, Andrea M. ^{[1
]}

Ginger, David S. ^{[1
]}

机构：

[1] Univ Washington, Dept Chem, Seattle, WA 98195 USA

来源：

NANO LETTERS | 2010年 / 10卷 / 07期

基金：

美国国家科学基金会;

关键词：

Localized surface plasmon resonance; metal nanoparticles; plasmon-enhanced emission; far-field scattering; fluorescence enhancement; photoluminescence lifetime; FLUORESCENCE INTENSITY; CDSE; DEPENDENCE; EFFICIENCY; FILMS; SIZE;

D O I：

10.1021/nl101281a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The near-field effects of plasmonic optical antennas are being explored in applications ranging from biosensors to solar cells We demonstrate that photoluminescence emission enhancement from CdSe quantum dots (QDs) can be obtained in the absence of any excitation enhancement near single silver nanoprisms The spectral dependence of the radiative and nonradiative decay rate of the QDs closely follows the silver nanoparticle plasmon scattering spectrum Using both experiment and theory we show that, in the absence of excitation enhancement, the ratio of radiative to nonradiative decay rate enhancement is proportional to the silver nanoparticle scattering efficiency These results provide guidelines both for separating excitation and emission enhancement effects in sensing and device applications and for tailoring emission enhancement effects using plasmonic nanostructures

引用

页码：2598 / 2603

页数：6

共 45 条

[1] Biosensing with plasmonic nanosensors [J].