Near-field Analysis of Strong Coupling between Localized Surface Plasmons and Excitons
arXiv:1912.05887 · doi:10.1103/PhysRevB.100.235448
Abstract
We simulate the near-field effects of strong coupling between molecular excitons and localized surface plasmons, supported by aluminum nanodisks. The simulations are done using a simple model of a two-level system, implemented in a commercial electromagnetic finite-difference time-domain solver. While the Rabi splitting is present in the near-field, its spectral gap is seen to be smaller than the one obtained in the far-field, although it follows a clear square root dependence on the molecular density as expected. Moreover, the energy exchange between the plasmonic mode and the excitonic material is evident in 'beats' within the electromagnetic near-field, which are out of phase with respect to the exciton population. Our results explicitly demonstrate the collective nature of strong coupling, which is expressed by the synchronized population oscillations at the collective Rabi frequency set by the number of molecules interacting with the plasmonic mode. This analysis sheds light on strong coupling effects in the near-field region using a versatile model, which provides a powerful tool to study strong coupling, near-field effects, and light-matter interactions in general.
References in corpus (14)
- Strong coupling between surface plasmon polaritons and emitters
- Nanoantennas for visible and infrared radiation
- Exciton-polariton condensates
- Vacuum Rabi splitting in a plasmonic cavity at the single quantum emitter limit
- Ultra-Strong Light-Matter Coupling Regime with Polariton Dots
- Lasing in dark and bright modes of a finite-sized plasmonic lattice
- Bose-Einstein Condensation in a Plasmonic Lattice
- Geometry dependence of surface lattice resonances in plasmonic nanoparticle arrays
- Lasing at the K-points of a honeycomb plasmonic lattice
- Topical Review: optics of exciton-plasmon nanomaterials
- Interaction and coherence of a plasmon-exciton polariton condensate
- Ultrafast Energy Transfer Between Molecular Assemblies and Surface Plasmons in the Strong Coupling Regime
- Exciton-polariton emission from organic semiconductor optical waveguides
- Plasmon transmission through excitonic subwavelength gaps