Multipole optical response of silicon nanoparticles of a conical shape

Terekhov, Pavel D.; Baryshnikova, Kseniia V.; Artemyev, Yuriy A.; Shalin, Alexander S.; Evlyukhin, Andrey B.; Karabchevsky, Alina

doi:10.1109/dd.2017.8168045

Cited by 3 publications

(3 citation statements)

References 20 publications

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“…The radiation powers of the induced multipoles are calculated using the induced current density distributions. The total radiation power magnitude can be described as follows [34][35][36]:…”

Section: Resultsmentioning

confidence: 99%

Analysis of coupling effect between metamolecules in toroidal metamaterials

Sun¹,

Yu²,

Wang³

et al. 2021

J. Phys. D: Appl. Phys.

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Anti-parallel aligned toroidal dipole arrays can be excited in metamaterials, and the total energy can be regulated by producing an antiparallel coupling effect between the toroidal dipoles. In this study, numerical and experimental analyses are performed on the coupling of toroidal moments in metamaterials. We introduce a new reverse toroidal dipole by altering the distance between metamolecules, and the correlation between the antiparallel coupling and the period is analyzed. The geometrical parameters of the period are found to play significant roles in altering the resonance response. When the intensities of two opposite dipoles are similar, the toroidal interaction energy reaches a maximum and increases the total energy, which results in an increase in the Q-factor. These results provide new insights regarding toroidal metamaterials with nontrivial yet controllable responses and for developing toroidal-based plasmonic applications.

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Section: Resultsmentioning

confidence: 99%

Analysis of coupling effect between metamolecules in toroidal metamaterials

Sun¹,

Yu²,

Wang³

et al. 2021

J. Phys. D: Appl. Phys.

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“…The bandwidth or quality (Q) factor of the absorber is determined by the radiative Q-factor (Q R ) of the two Mie-type resonances (ED and MD mode) and the non-radiative Q-factor (Q NR ) of the amorphous silicon. The overall Q of the absorber at resonance can be expressed as [35,41]. Thus, by overlapping the ED and MD resonances at the same wavelength and matching Q R with Q NR , over 70% absorption with a Q-factor ranging from 36 to 50 can be obtained in the single-layer absorber, corresponding to a spectral bandwidth ranging from 14 nm to 16.5 nm.…”

Section: Single-layer Absorber Designmentioning

confidence: 99%

Multilayer Huygens’ metasurface absorber toward snapshot multispectral imaging

Wen

Jin

Yang

2021

J. Opt.

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Multispectral or hyperspectral imaging requires the collection of a three-dimensional (3D) data cube that is composed of 2D spatial information and 1D spectral information of the scene. However, conventional cameras can only record 2D information, such that to obtain the 3D data cube, one needs to sacrifice either spatial or spectral resolution, or spatial or spectral scanning is required. Here, we introduce a multilayer metasurface absorber platform that may potentially allow the collection of a multispectral data cube in a single shot, without sacrificing the resolution. We design each absorber layer composed of silicon nano-resonators to support a Huygens’ mode in the visible spectrum, such that each layer may detect an impinging scene only within a narrow spectral band. We envision that the multilayer metasurface absorber, if integrated with proper electronics, may be used for snapshot multispectral imaging, with potential applications in target identification with high spatial and spectral resolution.

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“…In particular, for particles larger than 100 nm, Si submicrometer-sized spherical particles often have very high scattering efficiency in visible and near infrared range, depending on the particle size. This behavior is based on the magnetic dipole resonance in the dielectric Si nanoparticles [8,[14][15][16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Hydrofluoric acid pretreatment effect on the formation of silicon submicrometer particles by pulsed laser melting in liquid and their optical scattering property

2019

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Recently, the optical properties of silicon (Si) submicrometer spherical particles have been investigated to understand the dielectric nano-photonic function. Herein, we fabricated Si submicrometer spherical particles with high scattering efficiency using pulsed laser melting in deionized water or ethanol by irradiating laser at 66 mJ pulse−1 cm−2 via third harmonic of Nd:YAG laser. Hydrofluoric acid pretreatment was effective to remove surface oxide of raw Si particles; the laser fluence to obtain well crystallized spherical particles was lowered to 20 mJ pulse−1 cm−2 and the crystallinity of particles obtained were greatly improved without forming unwanted byproducts. The amount of particles was much more than those obtained by conventional fabrication technique. The particle size can be controlled by changing the laser fluence, and the scattering wavelength of colloidal solution can be controlled from visible to the near infrared range by increasing the laser fluence.

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Multipole optical response of silicon nanoparticles of a conical shape

Cited by 3 publications

References 20 publications

Analysis of coupling effect between metamolecules in toroidal metamaterials

Analysis of coupling effect between metamolecules in toroidal metamaterials

Multilayer Huygens’ metasurface absorber toward snapshot multispectral imaging

Hydrofluoric acid pretreatment effect on the formation of silicon submicrometer particles by pulsed laser melting in liquid and their optical scattering property

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