Title

Post-fabrication Voltage Controlled Resonance Tuning of Nanoscale Plasmonic Antennas

Authors

Authors

C. Lumdee; S. Toroghi;P. G. Kik

Comments

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

Abbreviated Journal Title

ACS Nano

Keywords

plasmon resonance tuning; anodization; image dipole; gold nanoparticle; aluminum; single particle spectroscopy; ENHANCED RAMAN-SCATTERING; NANOPARTICLE ARRAYS; OPTICAL-ABSORPTION; EXCITATION SPECTROSCOPY; SILVER NANOPARTICLES; GOLD NANOPARTICLES; SURFACE; ALUMINUM; SUBSTRATE; DIPOLE; Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &; Nanotechnology; Materials Science, Multidisciplinary

Abstract

Voltage controlled wavelength tuning of the localized surface plasmon resonance of gold nanoparticles on an aluminum film is demonstrated in single particle microscopy and spectroscopy measurements. Anodization of the Al film after nanoparticle deposition forms an aluminum oxide spacer layer between the gold particles and the Al film, modifying the particle substrate interaction. Darkfield microscopy reveals ring-shaped scattering images from individual Au nanoparticles, indicative of plasmon resonances with a dipole moment normal to the substrate. Single particle scattering spectra show narrow plasmon resonances that can be tuned from similar to 580 to similar to 550 nm as the anodization voltage increases to 12 V. All observed experimental trends could be reproduced in numerical simulations. The presented approach could be used as a general postfabrication resonance optimization step of plasmonic nanoantennas and devices.

Journal Title

Acs Nano

Volume

6

Issue/Number

7

Publication Date

1-1-2012

Document Type

Article

Language

English

First Page

6301

Last Page

6307

WOS Identifier

WOS:000306673800062

ISSN

1936-0851

Share

COinS