Plasmonic properties and energy flow in rounded hexahedral and octahedral nanoparticles

Tzarouchis, Dimitrios C.; Ylä‐Oijala, Pasi; Ala-Nissilä, Tapio; Sihvola, Ari

doi:10.1364/josab.33.002626

Cited by 9 publications

(6 citation statements)

References 44 publications

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“…The value p = 2 reproduces a sphere with radius a, p = 1 an octahedron, and for increasing p, the shape approaches a cube [18]. Figure 7 shows how the scattering response, in particular how the position of the main resonance shifts with the shape of the object.…”

mentioning

confidence: 98%

Resonances in small scatterers with impedance boundary

Sihvola¹,

Tzarouchis²,

Ylä‐Oijala³

et al. 2018

Phys. Rev. B

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With analytical (generalized Mie scattering) and numerical (integral-equation-based) considerations we show the existence of strong resonances in the scattering response of small spheres with lossless impedance boundary. With increasing size, these multipolar resonances are damped and shifted with respect to the magnitude of the surface impedance. The electric-type resonances are inductive and magnetic ones capacitive. Interestingly, these subwavelength resonances resemble plasmonic resonances in small negative-permittivity scatterers and dielectric resonances in small high-permittivity scatterers. The fundamental dipolar mode is also analyzed from the point of view of surface currents and the effect of the change of the shape into a non-spherical geometry.

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mentioning

confidence: 98%

Resonances in small scatterers with impedance boundary

Sihvola¹,

Tzarouchis²,

Ylä‐Oijala³

et al. 2018

Phys. Rev. B

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“…Gelder et al () and Fuchs () are probably the first who studied the resonances of cubic clusters and inclusions. Indicative numerical studies (Avelin et al, ; Hohenester & Krenn, ; Klimov et al, ; Ruppin, ; Sihvola et al, ; Tzarouchis et al, , ), and several experimental studies (Akselrod et al, ; Cortie et al, ; Lagos et al, ; Zhang et al, ), reveal a vibrant interest for the resonant behavior of the cube.…”

Section: Resonant Plasmonic Spectrum and Properties: Resultsmentioning

confidence: 99%

“…The inset figures indicate the surface charge distribution for the two first absorption resonances, that is, (a) the imaginary part of charge distribution at = 549.2 nm (electric dipole) and (b) the real part of the charge distribution at = 461.5 nm. Hohenester & Krenn, 2005;Klimov et al, 2014;Ruppin, 1996;Sihvola et al, 2004;Tzarouchis et al, 2016aTzarouchis et al, , 2016b, and several experimental studies (Akselrod et al, 2014;Cortie et al, 2012;Lagos et al, 2017;Zhang et al, 2011), reveal a vibrant interest for the resonant behavior of the cube. Figure 5 depicts the resonant spectra of the cube.…”

Section: Plasmonic Hexahedronmentioning

confidence: 99%

Study of Plasmonic Resonances on Platonic Solids

2017

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In this study we discuss the plasmonic subwavelength scattering resonances of five regular polyhedra, that is, the Platonic solids tetrahedron, hexahedron, octahedron, dodecahedron, and icosahedron. A brief discussion regarding their geometrical characteristics and the numerical method used in the study is given. All results are compared with the benchmark case of a sphere, in order to observe how the geometry of the solid affects the spectral characteristics. The principal finding is that the shift of the main dipole resonance exhibits a solid vertex hierarchical order; in other words, the position of the resonance correlates with the solid angle of the vertex of the given solid. This is in contrast with the hedra‐hierarchical order found for the electrostatic dielectric response of these solids. These results can create new avenues for applications and devices that require plasmonic particles with on‐demand functionalities.

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“…The work done by Sihvola et al [12] delivered several expressions of the polarizability of the Platonic solids, including the cube, for the dielectric domain [12]. Surprisingly, these expressions contained the approximative position for the main four plasmonic resonances [20] (see Table 2).…”

Section: Historical Remarks: Plasmonic Resonances Of a Cube (Years 1970-2004)mentioning

confidence: 99%

“…The first numerical attempts treating the cube (hexahedron) case, and its plasmonic resonances, were given by Gelder et al [10] and Fuchs [11] in the early 1970s. Since that time, the cube and its scattering characteristics have remained a fruitful research topic, with steadily increasing interest over the recent years [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Subwavelength Hexahedral Plasmonic Scatterers: History, Symmetries, and Resonant Characteristics

2019

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In this work, we investigate the resonant characteristics of hexahedral (cubical) inclusions at the plasmonic domain. After an introduction to the notion of superquadric surfaces, i.e., surfaces that model various versions of a rounded cube, we present the main resonant spectrum and the surface distributions for two particular cases of a smooth and a sharp cube in the plasmonic domain. We present a historical comparative overview of the main contributions available since the 1970s. A new categorization scheme of the resonances of a cube is introduced, based on symmetry considerations. The obtained results are compared against several recent works, exposing that the higher-order modes are extremely susceptible to both the choice of sharpness of the cube and the modeling mesh. This work can be readily used as a reference for both historical and contemporary studies of the plasmonic aspects of a cube.

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Plasmonic properties and energy flow in rounded hexahedral and octahedral nanoparticles

Cited by 9 publications

References 44 publications

Resonances in small scatterers with impedance boundary

Resonances in small scatterers with impedance boundary

Study of Plasmonic Resonances on Platonic Solids

Subwavelength Hexahedral Plasmonic Scatterers: History, Symmetries, and Resonant Characteristics

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