Extinction spectra of silver nanoparticle arrays

Shengli Zou, Linlin Zhao, George C. Schatz

Research output: Contribution to journalConference article

17 Citations (Scopus)

Abstract

The optical properties of silver nanoparticle arrays are studied by T-matrix and discrete dipole approximation (DDA) methods. Arrays of spherical silver particles with a radius of 30 nm are investigated with particular emphasis on the influence of array disorder on optical response. We find that the dipole peak intensities decrease when the array becomes disordered and the plasmon resonance wavelengths generally exhibit smaller blue shifts compared to perfectly ordered arrays. Using an extended DDA method, we calculate the extinction spectra of ordered nanodisk arrays, examining the variation of plasmon resonance wavelength with interparticle spacing (at fixed particle size). The calculated blue shift of the plasmon wavelength with decreasing interparticle spacing is found to be in excellent agreement with recent experiments.

Original languageEnglish
Pages (from-to)174-181
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5221
DOIs
Publication statusPublished - Dec 1 2003
EventPlasmonics: Metallic Nanostuctures and Their Optical Properties - San Diego, CA, United States
Duration: Aug 3 2003Aug 5 2003

    Fingerprint

Keywords

  • Array
  • Disorder
  • Extinction
  • Nanoparticle

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this