Enhancement of luminescence of Rhodamine B by gold nanoparticles in thin films on glass for active optical materials applications

Viktoria Levchenko, Michael Grouchko, Shlomo Magdassi, Tsiala Saraidarov, Renata Reisfeld

Research output: Contribution to journalArticlepeer-review

Abstract

Fluorescent dyes in solid matrices have many potential applications provided that their high optical efficiencies are achieved. We present here gold nanoparticles formed and incorporated together with fluorescent dye Rhodamine B into a film of polyvinyl alcohol (PVA). The increase of fluorescence of the dye results from its interaction with surface plasmons. The electric charge on the gold nanoparticles and the distance between them and the dye molecules has a significant effect on the fluorescence intensity. Fluorescence enhancement of 74% was achieved for the negatively charged particles. Dynamic measurements reveal decrease of fluorescent lifetimes of the dye in presence of gold nanoparticles. Our findings enable utilization of films with enhanced fluorescence in optical materials such as luminescence solar concentrators, solid state tunable laser and active waveguides.

Original languageAmerican English
Pages (from-to)360-364
Number of pages5
JournalOptical Materials
Volume34
Issue number2
DOIs
StatePublished - Dec 2011

Keywords

  • Gold plasmons
  • Increase transition probabilities
  • Luminescence

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • General Computer Science
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering
  • Spectroscopy
  • Inorganic Chemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry

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