Enhancement of single-molecule fluorescence using a gold nanoparticle as an optical nanoantenna

被引：1330

作者：

Kuehn, Sergei ^{[1
]}

Hakanson, Ulf ^{[1
]}

Rogobete, Lavinia ^{[1
]}

Sandoghdar, Vahid ^{[1
]}

机构：

[1] ETH, Chem Phys Lab, CH-8093 Zurich, Switzerland

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 97卷 / 01期

关键词：

D O I：

10.1103/PhysRevLett.97.017402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate the coupling of a single molecule to a single spherical gold nanoparticle acting as a nanoantenna. Using scanning probe technology, we position the particle in front of the molecule with nanometer accuracy and measure a strong enhancement of more than 20 times in the fluorescence intensity simultaneous to a 20-fold shortening of the excited state lifetime. Comparisons with three-dimensional calculations guide us to decipher the contributions of the excitation enhancement, spontaneous emission modification, and quenching. Furthermore, we provide direct evidence for the role of the particle plasmon resonance in the molecular excitation and emission processes.

引用

页数：4

共 25 条

[1] On-off blinking and multiple bright states of single europium ions in Eu3+:Y2O3 nanocrystals [J].