2020
DOI: 10.1088/1361-6463/ab8509
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Generalized local analogue model for nonlocal plasmonic nanostructures based on multiple-fluid hydrodynamic framework

Abstract: Spatial dispersion plays a critical role in nanophotonics when small plasmonic structures with feature sizes of few nanometers are handled. Such nonlocality is typically considered in a hydrodynamic framework and generally requires solving coupled partial differential equations, and therefore is involved. We develop a generalized local analogue model to reflect the nonlocal effects of plasmonic structures and avoid the complicated analysis within the multiple-fluid hydrodynamic framework, where more than one k… Show more

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Cited by 6 publications
(5 citation statements)
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“…Such a two-fluid model was furthermore used to investigate nonlocal interactions in electron-hole pairs of semiconductors [45,46]. A generalized multi-fluid model has recently been developed [47].…”
Section: Introductionmentioning
confidence: 99%
“…Such a two-fluid model was furthermore used to investigate nonlocal interactions in electron-hole pairs of semiconductors [45,46]. A generalized multi-fluid model has recently been developed [47].…”
Section: Introductionmentioning
confidence: 99%
“…Simultaneously, it has been applied to transformation-optics approaches to investigate the optical response of non-trivial plasmonic metasurfaces [ 26 , 27 ]. Up to now, research on the spatial dispersion based on the hydrodynamical mode has concentrated on two directions: (i) developing numerical tools based on the hydrodynamical mode to take account for the phenomena in different structures [ 15 , 23 , 28 , 29 ] and (ii) theoretically studying the effect of the spatial dispersion [ 24 , 30 , 31 ].…”
Section: Introductionmentioning
confidence: 99%
“…The GNOR theory has successfully explained both size-dependent plasmon line width broadening and resonance energy blue shifts in single metallic nanoparticles . To facilitate its implementation in any electromagnetic simulation platform, we have extended it to the generalized nonlocal optical response theory-based local analogue model (GNOR-LAM) by combining the local analogue model (LAM) with GNOR theory. , This approach eliminates the need for implementing a k -dependent permittivity and simplifies the simulation of plasmonic nanoparticles of different shapes. The optical response of metals in the frequency domain can be described by employing the coupled electromagnetic equations with GNOR theory: × × E false( boldr , ω false) = ( ω / c ) 2 ε core false( ω false) E false( boldr , ω false) + i ω μ 0 J false( boldr , ω false) false[ β 2 / ω ( ω + i γ ) + scriptD / i ω false] false[ · boldJ ( r , ω ) false] + J false( boldr , ω false) = σ false( ω false) J false( boldr , ω false) where induced current density J ( r , ω) represents the movement of free electrons in response to the incident electromagnetic field while the dielectric response from the bound electrons is denoted by ε core ( ω ).…”
mentioning
confidence: 99%
“…12 To facilitate its implementation in any electromagnetic simulation platform, we have extended it to the generalized nonlocal optical response theorybased local analogue model (GNOR-LAM) by combining the local analogue model (LAM) with GNOR theory. 21,22 This approach eliminates the need for implementing a k-dependent permittivity and simplifies the simulation of plasmonic nano-particles of different shapes. The optical response of metals in the frequency domain can be described by employing the coupled electromagnetic equations with GNOR theory: 23 c i…”
mentioning
confidence: 99%
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