Send to:

Choose Destination
See comment in PubMed Commons below
Nano Lett. 2013 Jul 10;13(7):3281-6. doi: 10.1021/nl4014887. Epub 2013 Jun 13.

Near-field mediated plexcitonic coupling and giant Rabi splitting in individual metallic dimers.

Author information

  • 1Department of Chemistry, ‡Department of Electrical and Computer Engineering, §Department of Physics and Astronomy, and ∥Laboratory for Nanophotonics, Rice University , 6100 Main Street, Houston, Texas 77005, United States.


Strong coupling between resonantly matched localized surface plasmons and molecular excitons results in the formation of new hybridized energy states called plexcitons. Understanding the nature and tunability of these hybrid nanostructures is important for both fundamental studies and the development of new applications. We investigate the interactions between J-aggregate excitons and single plasmonic dimers and report for the first time a unique strong coupling regime in individual plexcitonic nanostructures. Dark-field scattering measurements and finite-difference time-domain simulations of the hybrid nanostructures show strong plexcitonic coupling mediated by the near-field inside each dimer gap, which can be actively controlled by rotating the polarization of the optical excitation. The plexciton dispersion curves, obtained from coupled harmonic oscillator models, show anticrossing behavior at the exciton transition energy and giant Rabi splitting ranging between 230 and 400 meV. These energies are, to the best of our knowledge, the largest obtained on individual hybrid nanostructures.

PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for American Chemical Society
    Loading ...
    Write to the Help Desk