Plasmon Emission Quantum Yield of Single Gold Nanorods as a Function of Aspect Ratio

被引：183

作者：

Fang, Ying ^{[1
]}

Chang, Wei-Shun ^{[1
]}

Willingham, Britain ^{[1
]}

Swanglap, Pattanawit ^{[1
]}

Dominguez-Medina, Sergio ^{[1
]}

Link, Stephan ^{[1
,2
]}

机构：

[1] Rice Univ, Dept Chem, Houston, TX 77005 USA

[2] Rice Univ, Dept Elect & Comp Engn, Lab Nanophoton, Houston, TX 77005 USA

来源：

ACS NANO | 2012年 / 6卷 / 08期

基金：

美国国家科学基金会;

关键词：

photoluminescence; surface plasmons; gold nanorods; plasmon emission; electron-hole pairs; NANOPARTICLES; LUMINESCENCE; PHOTOLUMINESCENCE; FLUORESCENCE; SPECTROSCOPY; ENHANCEMENT; ABSORPTION; EXCITATION; PHOTOEMISSION; NANOCRYSTALS;

D O I：

10.1021/nn3022469

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report on the one-photon photoluminescence of gold nanorods with different aspect ratios. We measured photoluminescence and scattering spectra from 82 gold nanorods using single-particle spectroscopy. We found that the emission and scattering spectra closely resemble each other independent of the nanorod aspect ratio. We assign the photoluminescence to the radiative decay of the longitudinal surface plasmon generated after fast interconversion from excited electron-hole pairs that were initially created by 532 nm excitation. The emission intensity was converted to the quantum yield and was found to approximately exponentially decrease as the energy difference between the excitation and emission wavelength increased for gold nanorods with plasmon resonances between 600 and 800 nm. We compare this plasmon emission to its molecular analogue, fluorescence.

引用

页码：7177 / 7184

页数：8

共 43 条

[1] Continuum generation from single gold nanostructures through near-field mediated intraband transitions [J].