Generalized electromagnetic theorems for nonlocal plasmonics

Sakat, Emilie; Moreau, Antoine; Hugonin, Jean‐Paul

doi:10.1103/physrevb.103.235422

Cited by 7 publications

(4 citation statements)

References 40 publications

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“…It is worth noting however that classical consideration used here stops holding for the case of few nanometers and smaller particles where more detailed models of carrier behavior in the scatter need to be considered such as models taking into account non‐local effects. [ 84–86 ] Finally, one can observe how the backward‐forward scattering ratio behaves for the metals and dielectrics (see bottom of Figure 6). In all cases the forward‐backward scattering ratio

{R_{bf}}

starts with 0.5 which corresponds to the symmetric Rayleigh scattering.…”

Section: Mie Scatteringmentioning

confidence: 99%

Mie Scattering for Photonic Devices

Dorodnyy

Smajić

Leuthold

2023

Laser & Photonics Reviews

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Mie scattering is increasingly exploited to manipulate electromagnetic fields to achieve strong resonant enhancement, to obtain perfect absorption of radiation, and to generate polarization or wavelength selectivity and/or sensitivity. In fact, a multitude of photonic applications are arising that benefit from Mie scattering and have already led to the formation of novel image and hologram schemes or to the design of efficient and compact photodetectors and light sources. Here, the Mie scattering theory for spherical scatterers is reviewed, the basics of the field‐decomposition onto the Mie modes are shown, and dielectric and metallic particles are compared. Recent applications for light spectrum control, detection, non‐linear effects enhancement, and emission are reviewed. How a periodic arrangement of Mie‐scatterers can be utilized to create a strong (in the order of 10 to 100) absorption enhancement in otherwise weakly absorbing layers is also demonstrated. The enhancement dependence on the diameter‐to‐wavelength ratio of the scatterer is analyzed, and how the influence of different Mie‐modes can be distinguished in the periodic array by looking at the field components normal to the scatterer surface is discussed.

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{R_{bf}}

starts with 0.5 which corresponds to the symmetric Rayleigh scattering.…”

Section: Mie Scatteringmentioning

confidence: 99%

Mie Scattering for Photonic Devices

Dorodnyy

Smajić

Leuthold

2023

Laser & Photonics Reviews

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show abstract

“…The peaks in the electric field drastically increase the losses experienced by the gap plasmon, since the local absorption by the electron gas is proportional to E 1 • J * , where * denotes the complex conjugate [47]. This explains the larger imaginary part.…”

Section: A Lra With Spill-outmentioning

confidence: 99%

Influence of the electron spill-out and nonlocality on gap plasmons in the limit of vanishing gaps

et al. 2021

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We study the effect of electron spill-out and of nonlocality on the propagation of light inside a gap between two semi-infinite metallic regions. We compare the predictions of a local response model taking into account only the spill-out, to the predictions of a quantum hydrodynamic model able to take both phenomena into account. We show that only the latter is able to correctly retrieve the correct limit when the gap closes, while the local model suffers from undesirable features (divergence of the fields, overestimation of the losses). Finally, we show that, to a certain extent, the correct results can be retrieved using a simple local approach without spill-out or a conventional Thomas-Fermi approximation, but considering an effective gap width.

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Section: A Simplified Modelmentioning

confidence: 99%

Influence of the electron spill-out and nonlocality on gap-plasmons in the limit of vanishing gaps

Khalid,

Morandi,

Mallet

et al. 2021

Preprint

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We study the effect of electron spill-out and of nonlocality on the propagation of light inside a gap between two semi-infinite metallic regions. We first present a simplified physical model for the spill-out phenomenon, an approach sufficient to show that the propagation of the gap-plasmon becomes impossible in the tunneling regime. However, in the limit of very small gaps, only a Quantum Hydrodynamic Theory (QHT) approach, taking into account both the electron spillout and nonlocality, is able to accurately model the gap-plasmon characteristics and to correctly retrieve the refractive index of the bulk metal as the limit of the effective index of the gap-plasmon for vanishing gaps. Finally, we analyze the relation between different models and show that up to a certain size it is possible to predict the correct gap-plasmon effective index by considering a properly resized effective gap.

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Generalized electromagnetic theorems for nonlocal plasmonics

Cited by 7 publications

References 40 publications

Mie Scattering for Photonic Devices

Mie Scattering for Photonic Devices

Influence of the electron spill-out and nonlocality on gap plasmons in the limit of vanishing gaps

Influence of the electron spill-out and nonlocality on gap-plasmons in the limit of vanishing gaps

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