Unusual resonances in nanoplasmonic structures due to nonlocal response

By S. Raza, G. Toscano, A. Jauho, M. Wubs, Niels Asger Mortensen. 2011

227 citations recorded by the source corpus.

We study the nonlocal response of a confined electron gas within the hydrodynamical Drude model. We address the question as to whether plasmonic nanostructures exhibit nonlocal resonances that have no counterpart in the local-response Drude model. Avoiding the usual quasistatic approximation, we find that such resonances do indeed occur, but only above the plasma frequency. Thus the recently found nonlocal resonances at optical frequencies for very small structures, obtained within quasistatic approximation, are unphysical. As a specific example we consider nanosized metallic cylinders, for which extinction cross sections and field distributions can be calculated analytically.

Subfields: Atomic and Molecular Physics, and Optics, Biomedical Engineering, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/e6bca8866fcab884cf02205218154413c69811ae

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In Atomic and Molecular Physics, and Optics

In Biomedical Engineering

In Electronic, Optical and Magnetic Materials

Citations in the corpus

Quantum Plasmonics (2016, background): “Equation (7) is now solved self-consistently along with Maxwell’s equations; it is known that retardation is important to include and that taking the static (curl free) approximation introduces unphysical modes below the plasma frequency [80].”
Blueshift of the surface plasmon resonance in silver nanoparticles studied with EELS (2012, background): “The dynamics of the electron gas is governed by the semiclassical hydrodynamic equation of motion [25, 26, 34], which results in an inhomogeneous electron density profile.”