Modeling and Interpretation of Hybridization in Coupled Plasmonic Systems

Bakhti, Saïd; Destouches, Nathalie; Tishchenko, A.V.

doi:10.1007/978-3-319-24606-2_2

Cited by 4 publications

(4 citation statements)

References 20 publications

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“…Then a single spherical particle sustains several resonant modes only coupled to the exciting light and without any interplay between them. In turn, a collection of particles may sustain some so called hybrid modes, resulting from the scattering induced coupling between the plasmon resonances of the different particles 8 44 . In the present case we do not treat the structure as a collection of nine mutually coupled particles, which would require a too tedious analysis.…”

Section: Resultsmentioning

confidence: 99%

Fano-like resonance emerging from magnetic and electric plasmon mode coupling in small arrays of gold particles

Bakhti

Tishchenko

Zambrana‐Puyalto

et al. 2016

Sci Rep

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In this work we theoretically and experimentally analyze the resonant behavior of individual 3 × 3 gold particle oligomers illuminated under normal and oblique incidence. While this structure hosts both dipolar and quadrupolar electric and magnetic delocalized modes, only dipolar electric and quadrupolar magnetic modes remain at normal incidence. These modes couple into a strongly asymmetric spectral response typical of a Fano-like resonance. In the basis of the coupled mode theory, an analytical representation of the optical extinction in terms of singular functions is used to identify the hybrid modes emerging from the electric and magnetic mode coupling and to interpret the asymmetric line profiles. Especially, we demonstrate that the characteristic Fano line shape results from the spectral interference of a broad hybrid mode with a sharp one. This structure presents a special feature in which the electric field intensity is confined on different lines of the oligomer depending on the illumination wavelength relative to the Fano dip. This Fano-type resonance is experimentally observed performing extinction cross section measurements on arrays of gold nano-disks. The vanishing of the Fano dip when increasing the incidence angle is also experimentally observed in accordance with numerical simulations.

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Section: Resultsmentioning

confidence: 99%

Fano-like resonance emerging from magnetic and electric plasmon mode coupling in small arrays of gold particles

Bakhti

Tishchenko

Zambrana‐Puyalto

et al. 2016

Sci Rep

Self Cite

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“…Highly ordered nanoparticle (NP) arrays can show optical response characterized by additional features compared to the case of individual NPs, for which the typical optical spectrum is mainly characterized by an absorption band, resulting from the excitation of the localized surface plasmon resonance (LSPR) [1]. In particular, the electromagnetic interaction between neighbouring NPs, mediated by near-or far-field coupling effects, can lead to the appearance of collective modes like Fano-resonances [2], grating-induced plasmon modes [3,4] and light waveguiding [5,6], which are of great interest since they could spread and strengthen the application of NP systems to photonic [7][8][9], sensing [10][11][12] or security technologies [13,14]. In recent years, though, much effort has been addressed to the exploration of different fabrication techniques to achieve precise control over the organization of metal NPs.…”

Section: Introductionmentioning

confidence: 99%

Polarization-driven self-organization of silver nanoparticles in 1D and 2D subwavelength gratings for plasmonic photocatalysis

Baraldi¹,

Bakhti²,

Liu³

et al. 2016

Nanotechnology

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One of the main challenges in plasmonics is to conceive large-scale, low-cost techniques suitable for the fabrication of metal nanoparticle patterns showing precise spatial organization. Here, we introduce a simple method based on continuous-wave laser illumination to induce the self-organization of silver nanoparticles within high-index thin films. We show that highly regular and homogeneous nanoparticle gratings can be produced on large areas using laser-controlled self-organization processes. This very versatile technique can provide 1D and 2D patterns at a subwavelength scale with tunable features. It does not need any stabilization or expensive devices, such as those required by optical or electron lithography, and is rapid to implement. Accurate in-plane and in-depth characterizations provide valuable information to explain the mechanisms that lead to pattern formation and especially how 2D self-organization can fall into place with successive laser scans. The regular and homogeneous 2D self-organization of metallic NPs with a single laser scan is also reported for the first time in this article. As the reported nanostructures are embedded in porous TiO, we also theoretically explore the interesting potential of organization on the photocatalytic activity of Ag-NP-containing TiO porous films, which is one of the most promising materials for self-cleaning or remediation applications. Realistic electromagnetic simulations demonstrate that the periodic organization of silver nanoparticles can increase the light intensity within the film more than ten times that produced with randomly distributed nanoparticles, leading as expected to enhanced photocatalytic efficiency.

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“…In presence of subdominant new physics effects such as non-standard interactions (NSI) during propagation, the resolution of neutrino mass ordering gets severely affected even if we take conservative values of the NSI parameters (for reviews, see [9,10]). Recently, we have studied the influence of NSI during propagation (including both flavour non-universal and flavour changing interactions) on the CP violation sensitivity at a future super beam experiment, Deep Underground Neutrino Experiment (DUNE) [11][12][13][14][15] where we considered the so called platinum channel (ν µ → ν e ) [16] (see also [17][18][19][20][21][22][23]). In Ref.[24], we discussed the role of disappearance channel (ν µ → ν µ ) in addition to the platinum channel and contrasted the CP sensitivities offered by some of the current and upcoming long baseline experiments such as Tokai to Kamioka (T2K) [25], NuMI off-axis ν e appearance (NOvA) [26,27], DUNE as well as Tokai to Hyper-Kamiokande (T2HK) [28].Apart from using the super beam experiments which are well-suited to exploit the platinum channel, the question of neutrino mass ordering can be addressed utilising sensitivity offered by other channels such asν e →ν e in reactor experiments (e.g.…”

mentioning

confidence: 99%

“…Recently, we have studied the influence of NSI during propagation (including both flavour non-universal and flavour changing interactions) on the CP violation sensitivity at a future super beam experiment, Deep Underground Neutrino Experiment (DUNE) [11][12][13][14][15] where we considered the so called platinum channel (ν µ → ν e ) [16] (see also [17][18][19][20][21][22][23]). In Ref.…”

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confidence: 99%

Nonstandard interactions and resolving the ordering of neutrino masses at DUNE and other long baseline experiments

Masud

Mehta

2016

Phys. Rev. D

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In the era of precision neutrino physics, we study the influence of matter NSI on the question of neutrino mass ordering and its resolution. At long baseline experiments, since matter effects play a crucial role in addressing this very important question, it is timely to investigate how sub-leading effects due to NSI may affect and drastically alter inferences pertaining to this question. We demonstrate that the sensitivity to mass ordering gets significantly impacted due to NSI effects for various long baseline experiments including the upcoming long baseline experiment, Deep Underground Neutrino Experiment (DUNE). Finally we draw a comparison of DUNE, with the sensitivities offered by two of the current neutrino beam experiments NOvA and T2K.

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Modeling and Interpretation of Hybridization in Coupled Plasmonic Systems

Cited by 4 publications

References 20 publications

Fano-like resonance emerging from magnetic and electric plasmon mode coupling in small arrays of gold particles

Fano-like resonance emerging from magnetic and electric plasmon mode coupling in small arrays of gold particles

Polarization-driven self-organization of silver nanoparticles in 1D and 2D subwavelength gratings for plasmonic photocatalysis

Nonstandard interactions and resolving the ordering of neutrino masses at DUNE and other long baseline experiments

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