Tunable plasmon polaritons in arrays of interacting metallic nanoparticles

Abstract

We consider a simple cubic array of metallic nanoparticles supporting extended collective plasmons that arise from the near-field dipolar interaction between localized surface plasmons in each nanoparticle. We develop a fully analytical quantum theory of the strong-coupling regime between these collective plasmons and photons resulting in plasmon polaritons in the nanoparticle array. Remarkably, we show that the polaritonic band gap and the dielectric function of the metamaterial can be significantly modulated by the polarization of light. We unveil how such an anisotropic behavior in the plasmonic metamaterial is crucially mediated by the dipolar interactions between the nanoparticles despite the symmetry of the underlying lattice. Our results thus pave the way towards the realization of tunable quantum plasmonic metamaterials presenting interaction-driven birefringence.

arXiv comment8 pages, 4 figures; published version

References in corpus (7)

• Quantum Plasmonics
• Propagation of optical excitations by dipolar interactions in metal nanoparticle chains
• Surface Plasmon Dispersion Relations in Chains of Metallic Nanoparticles: Exact Quasistatic Calculation
• Complex response and polariton-like dispersion splitting in periodic metal nanoparticle chains
• Dirac-like plasmons in honeycomb lattices of metallic nanoparticles
• Surface plasmon in metallic nanoparticles: renormalization effects due to electron-hole excitations
• Lifetime of the first and second collective excitations in metallic nanoparticles

Cited by in corpus (7)

• Topological collective plasmons in bipartite chains of metallic nanoparticles
• Topological phases of polaritons in a cavity waveguide
• Quantum metamaterials in the microwave and optical ranges
• Nonradiative limitations to plasmon propagation in chains of metallic nanoparticles
• Plasmon polaritons in cubic lattices of spherical metallic nanoparticles
• Plasmon-Polaritons in Nanoparticle Supercrystals: Microscopic Quantum Theory Beyond the Dipole Approximation
• Dirac plasmons in bipartite lattices of metallic nanoparticles