Optical Response of Hybrid Plasmon-Exciton Nanomaterials in the Presence of Overlapping Resonances

Maxim Sukharev, Paul N. Day, Ruth Pachter

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

We consider a hybrid plasmon-exciton system comprising a resonant molecular subsystem and three Au wires supporting a dipole mode that can be coupled to a dark mode in controllable fashion by variation of a symmetry parameter. The physics of such a system under strong coupling conditions is examined in detail. It is shown that if two wires supporting the dark mode are covered with molecular layers, the system exhibits four resonant modes for a strong coupling regime due to asymmetry and lifted degeneracy of the molecular state in this case, while upon having molecular aggregates covering the top wire with a dipolar mode, three resonant modes appear. Pump-probe simulations are performed to scrutinize the quantum dynamics and find possible ways to control plasmon-exciton materials. It is demonstrated that one can design hybrid nanomaterials with highly pronounced Fano-type resonances when excited by femtosecond lasers.

Original languageEnglish (US)
Pages (from-to)935-941
Number of pages7
JournalACS Photonics
Volume2
Issue number7
DOIs
StatePublished - Jul 15 2015

Keywords

  • exciton-plasmon coupling
  • Fano resonance
  • surface plasmons

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Biotechnology
  • Electrical and Electronic Engineering

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