Coupling Quantum Emitters to Random 2D Nanoplasmonic Structures

Thomas A.R. Purcell, Matan Galanty, Shira Yochelis, Yossi Paltiel, Tamar Seideman*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

We combine theory and experimental studies to investigate the coupling between colloidal quantum dots and randomly generated gold nanoislands. In such devices, the gold nanoislands act as classical antennas, amplifying the light absorbed by the quantum dots. They may thus find applications in detection, sensing, and plasmon-enhanced solar energy conversion. We use the two-dimensional finite-difference time-domain method to demonstrate plasmonic control of the enhancement factor near the island's plasmon resonance. Furthermore, we experimentally and numerically show how tuning the plasmon resonance to the band gap energy of the quantum dot can lead to a broadening of the quantum dot's absorption peak. The simulations predict a surprising linear scaling with quantum dot density, which is confirmed by experimental results.

Original languageEnglish (US)
Pages (from-to)21837-21842
Number of pages6
JournalJournal of Physical Chemistry C
Volume120
Issue number38
DOIs
StatePublished - Sep 29 2016

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Surfaces, Coatings and Films
  • Physical and Theoretical Chemistry

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