Title

Gap-Plasmon Enhanced Gold Nanoparticle Photoluminescence

Authors

Authors

C. Lumdee; B. F. Yun;P. G. Kik

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

ACS Photonics

Keywords

gap plasmon; gap mode; plasmon resonance; gold nanoparticle; gold; photoluminescence; photoluminescence enhancement; NOBLE-METALS; QUANTUM YIELD; NANORODS; LUMINESCENCE; EMISSION; ANTENNAS; NANOSTRUCTURES; SPECTROSCOPY; SURFACES; MIRROR; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Optics; Physics, Applied; Physics, Condensed Matter

Abstract

Gap-plasmon-enhanced gold nanoparticle photoluminescence is studied experimentally at the single-particle level. The photoluminescence spectra of gold nanoparticles on an Al2O3-coated gold film under both 532 and 633 run excitation show a clear peak near the measured gap-plasmon resonance wavelength. Comparing the collected emission spectrum with that from a gold reference film under 633 nm excitation, a peak photoluminescence enhancement factor of 28 000 is observed. The spectral shape and absolute magnitude of the enhancement factors for both excitation wavelengths are reproduced using numerical calculations without the use of any free parameters. The photoluminescence enhancement is explained in terms of a gap-mode-enhanced e h pair generation rate and a wavelength-dependent enhancement of the emission efficiency.

Journal Title

Acs Photonics

Volume

1

Issue/Number

11

Publication Date

1-1-2014

Document Type

Article

Language

English

First Page

1224

Last Page

1230

WOS Identifier

WOS:000345542400019

ISSN

2330-4022

Share

COinS