Surface-response functions obtained from equilibrium electron-density profiles

Mortensen, N. Asger; Gonçalves, P. A. D.; Shuklin, Fedor A.; Cox, Joel D.; Tserkezis, Christos; Wolff, Christian

doi:10.1515/nanoph-2021-0084

Cited by 27 publications

(16 citation statements)

References 98 publications

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“…( 6)) will lead to a situation with a finite surface response. To appreciate this, we note that for a spatially varying local dielectric function 𝜀(x), the induced charge 𝜚(x) is given by [271] 1…”

Section: How To Determine Feibelman Parameters?mentioning

confidence: 99%

“…We emphasize that this concept of a spatially varying plasma frequency has found broad use, including Refs. [203,205,271,[276][277][278][279][280][281]. The idea of a smoothly varying profile has also been considerations of local-field corrections [282].…”

Section: Local-response Approximation With Equilibrium Electron-densi...mentioning

confidence: 99%

“…To illustrate the effects of spill-out, we consider the smooth profile of the equilibrium electron density Π(x) = [271,283], where a is the characteristic length over which the electron density drops. The Heaviside function terminates the electron density beyond x = x 0 , where the sign of x 0 captures whether the induced electron density spills inward or outward.…”

Section: Local-response Approximation With Equilibrium Electron-densi...mentioning

confidence: 99%

“…In order to allow experiments to independently settle on the relative importance of quantum tunneling and Landau damping, circular dichroism in nanoparticle helices has recently been proposed as a useful platform [332]. No matter the efforts in finding fruitful materials systems, a more fundamental challenge remains: dynamic tunneling phenomena rely critically on overlapping evanescent tails of electron density reaching beyond the surfaces of the metals, but the very same tails constitute a source of surface response too [271]. As a fundamental consequence of causality and Kramers-Kronig relations [41], this surface response is inevitably associated with surface-enhanced Landau damping.…”

Section: Quantum Tunnelingmentioning

confidence: 99%

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Mesoscopic electrodynamics at metal surfaces

Mortensen

2021

Nanophotonics

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Plasmonic phenomena in metals are commonly explored within the framework of classical electrodynamics and semiclassical models for the interactions of light with free-electron matter. The more detailed understanding of mesoscopic electrodynamics at metal surfaces is, however, becoming increasingly important for both fundamental developments in quantum plasmonics and potential applications in emerging light-based quantum technologies. The review offers a colloquial introduction to recent mesoscopic formalism, ranging from quantum-corrected hydrodynamics to microscopic surface-response formalism, offering also perspectives on possible future avenues.

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Section: How To Determine Feibelman Parameters?mentioning

confidence: 99%

Section: Local-response Approximation With Equilibrium Electron-densi...mentioning

confidence: 99%

Section: Local-response Approximation With Equilibrium Electron-densi...mentioning

confidence: 99%

Section: Quantum Tunnelingmentioning

confidence: 99%

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Mesoscopic electrodynamics at metal surfaces

Mortensen

2021

Nanophotonics

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“…Our recent study has also shown that the quantum effect can be investigated using the local dielectric function in Eq. (4) [30].…”

Section: Equations For Localized Plasmons In Metal Nanostructures a Scalar Potential In The Quasi-static Approximationmentioning

confidence: 99%

Excitation of Localized Plasmons in Metal Nanoshell and Nanotube with Dielectric Cores

Ichikawa

2021

e-J. Surf. Sci. Nanotechnol.

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Metal nanoshells and nanotubes with dielectric cores are useful structures to change the surface plasmon frequencies in the wide range. Here, our localized plasmon theory derived in the random phase approximation at high frequency condition is applied to investigate the localized plasmon excitations for metal nanoshells and nanotubes with dielectric cores, which are embedded in dielectrics. Assuming that local dielectric functions for metals and dielectrics have step function shapes at the metal and dielectric interfaces in the quasi-static approximation, analytical formulas can be derived for the localized plasmon excitation. It is found that the bonding and antibonding localized surface plasmons are excited when the nanoshell and nanotube have finite thicknesses and that the surface plasmon frequencies can be controlled in the wide range by changing the ratio of the inner radius to the outer one of the nanoshell and nanotube. The localized surface plasmons, however, are not excited in the zero-thickness limit, i.e., two-dimensional shell where only the lights are emitted from the interfaces of dielectric cores and surrounding dielectrics.

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Nonlocal response of planar plasmonic layers

Burda,

Richter,

Kwiecien

2023

Opt Quant Electron

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Nonlocal interactions of plasmonic nanostructures are currently being intensively investigated. It is generally accepted that nonlocal interactions are most pronounced on structures with nanometer unit sizes and affect the shape of spectral functions of characterizing quantities in the resonance region. Numerical analysis of nonlocal phenomena is very complicated and it is advantageous to use it for the analysis of geometrically more complex structures. For some simple structures it is possible to find analytical solutions which can then be used, among other purposes, to build semi-analytical approaches for the analysis of some more complex structures. This article is focused on the efficient description of nonlocal manifestations of the planar plasmonic layers using a hydrodynamic model. The originality is particulary focused on the extension from the single nonlocal layer towards the more general case of two adjacent nonlocal layers (bilayers). The results for both single layer and bilayer case are presented and discussed in detail. Also, one of the here presented important technical results is the novel presentation of the transfer matrices for the nonzero normal component of the current densities at the interfaces of the plasmonic layer.

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Surface-response functions obtained from equilibrium electron-density profiles

Cited by 27 publications

References 98 publications

Mesoscopic electrodynamics at metal surfaces

Mesoscopic electrodynamics at metal surfaces

Excitation of Localized Plasmons in Metal Nanoshell and Nanotube with Dielectric Cores

Nonlocal response of planar plasmonic layers

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