Nonlocal Optical Response of Particle Plasmons in Single Gold Nanorods

Abstract

The investigation of particle plasmons in metal nanoparticles has predominantly relied on local optical response approximations. However, as the nanoparticle size approaches the average distance of electrons to the metal surface, mesoscopic effects such as size-dependent plasmon line width broadening and resonance energy blue shifts are expected to become observable. In this work, we compared the experimental spectral characteristics with simulated values obtained by using a generalized nonlocal optical response theory-based local analogue model. Our results show that the nonlocal plasmon damping effects in single nanoparticles are less pronounced than those observed in plasmon-coupled systems. Furthermore, our research demonstrates that single-particle dark-field spectroscopy is an effective tool for investigating the nonlocal optical response of particle plasmons in single nanoparticles. These results have important implications for the rational design of novel nanophotonic devices.

Correction to “Nonlocal Optical Response of Particle Plasmons in Single Gold Nanorods”

“…In the initial publication, we noticed some typographical errors in eqs and . Below, we present the corrected versions without any alterations to our research findings normal∇ × normal∇ × E ( r , ω ) = false( ω / c false) 2 [ ε false( ω false) + ξ GNOR 2 ∇ false( normal∇ · false) ] E ( r , ω ) where ξ GNOR 2 = ε normalc normalo normalr normale ( ω ) [ β 2 + D false( γ − i ω false) ] / ω ( ω + i γ ) is the GNOR nonlocal parameter and ε(ω) = ε core (ω) + iσ (ω)/ε 0 ω is the Drude-like permittivity of the metal. ε normalt ( ω ) = false{ false[ ε ( ω ) 3 / 2 ε normalb ...…”

“…In the initial publication, we noticed some typographical errors in eqs and . Below, we present the corrected versions without any alterations to our research findings where is the GNOR nonlocal parameter and ε­(ω) = ε core (ω) + iσ (ω)/ε 0 ω is the Drude-like permittivity of the metal. The thickness of the thin layer is represented by d , whereas ε b (ω) denotes the dielectric permittivity of the background.…”