Disorder-induced Purcell enhancement in nanoparticle chains

Abstract

In this paper we report on numerical study of plasmonic nanoparticle chains with long-range dipole-dipole interaction. We have shown that introduction of positional disorder gives a peak in the density of resonant states (DOS) at the frequency of individual nanoparticle resonance. This peak is referred to Dyson singularity in one-dimensional disordered structures [Dyson F., 1953] and, according to our calculations, governs the spectral properties of local DOS. This provides disorder-induced Purcell enhancement that can found its applications in random lasers and for SERS spectroscopy. We stress that this effect relates not only to plasmonic nanoparticles but to an arbitrary chain of nanoparticles or atoms with resonant polarizabilities.

arXiv comment9 pages, 9 figures, 41 references, regular paper

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• Topological plasmons in dimerized chains of nanoparticles: robustness against long-range quasistatic interactions and retardation effects
• Nonradiative limitations to plasmon propagation in chains of metallic nanoparticles
• Plasmon polaritons in cubic lattices of spherical metallic nanoparticles
• Retardation effects on the dispersion and propagation of plasmons in metallic nanoparticle chains
• Plasmons in two-dimensional lattices of near-field coupled nanoparticles
• Quantum theory of plasmon polaritons in chains of metallic nanoparticles: From near- to far-field coupling regime
• Luminescence Enhancement in One-Dimensional Mie-Resonant Arrays
• High-Q localized states in finite arrays of subwavelength resonators