Plasmonic Metamaterial Absorbers from Dense Gold Nanoparticle Stacks

Sheldon Hewlett, Adam Mock

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Gold nanoparticle solutions were used to make highly absorbing, dense nanoparticle stacks (DNpS) using a simple and inexpensive solution cast method. UV-Vis spectroscopy and reflection measurements were used to characterize absorption. The critical nanoparticle number necessary to obtain maximal absorption was determined for each sample. DNpS metamaterials made from 18- and 44-nm-diameter particles exhibited broadband absorbances above 80 %, with the highest absorption of 95 % at 532 nm. The experimental absorption results agree well with finite-difference time-domain (FDTD) modeling.

Original languageEnglish
Pages (from-to)419-425
Number of pages7
JournalPlasmonics
Volume12
Issue number2
DOIs
StatePublished - Apr 1 2017

Keywords

  • Disordered plasmonics
  • Gold
  • Metamaterial absorbers

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