Strongly coupled plasmonic modes on macroscopic areas via template-assisted colloidal self-assembly

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • Christoph Hanske - , University of Bayreuth (Author)
  • Moritz Tebbe - , University of Bayreuth (Author)
  • Christian Kuttner - , University of Bayreuth (Author)
  • Vera Bieber - , University of Bayreuth (Author)
  • Vladimir V. Tsukruk - , Georgia Institute of Technology (Author)
  • Munish Chanana - , University of Bayreuth, ETH Zurich (Author)
  • Tobias A.F. König - , University of Bayreuth, Georgia Institute of Technology (Author)
  • Andreas Fery - , University of Bayreuth (Author)

Abstract

We present ensembles of surface-ordered nanoparticle arrangements, which are formed by template-assisted self-assembly of monodisperse, protein-coated gold nanoparticles in wrinkle templates. Centimeter-squared areas of highly regular, linear assemblies with tunable line width are fabricated and their extinction cross sections can be characterized by conventional UV/vis/NIR spectroscopy. Modeling based on electrodynamic simulations shows a clear signature of strong plasmonic coupling with an interparticle spacing of 1-2 nm. We find evidence for well-defined plasmonic modes of quasi-infinite chains, such as resonance splitting and multiple radiant modes. Beyond elementary simulations on the individual chain level, we introduce an advanced model, which considers the chain length distribution as well as disorder. The step toward macroscopic sample areas not only opens perspectives for a range of applications in sensing, plasmonic light harvesting, surface enhanced spectroscopy, and information technology but also eases the investigation of hybridization and metamaterial effects fundamentally.

Details

Original languageEnglish
Pages (from-to)6863-6871
Number of pages9
JournalNano letters
Volume14
Issue number12
Publication statusPublished - 10 Dec 2014
Peer-reviewedYes
Externally publishedYes

Keywords

Keywords

  • electromagnetic simulations, gold nanoparticle chains, protein coating, strong plasmon coupling, superradiant and subradiant modes