Study of Plasmonic Resonances on Platonic Solids

Tzarouchis, Dimitrios C.; Ylä‐Oijala, Pasi; Sihvola, Ari

doi:10.1002/2017rs006378

Cited by 6 publications

(11 citation statements)

References 51 publications

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“…The octahedron has the dual shape of the cube and the solid angle sharper than the cube, however, smoother than the one of the tetrahedron [36]. Therefore, we expect that its two main resonances are going to be redshifted when compared to the cube, but blueshifted (shifted to lower wavelengths) when compared to the tetrahedron [36].…”

Section: Plasmonic Octahedronmentioning

confidence: 99%

“…The electromagnetic response of a hexahedron, or commonly known as the cube, has been studied intensively during the last 50 years (see [36] and references therein). From Fig.…”

Section: Plasmonic Hexahedron (Cube)mentioning

confidence: 99%

“…Recent advances in nanofabrication have allowed the manipulation of the shape of nanoparticles up to the subnanometer scale [28][29][30][31] introducing atomically sharp tips around which electromagnetic energy can be successfully confined (so-called "hot spots") [32]. Therefore, the accurate modeling of the singular field quantities induced around abrupt geometrical singularities is of great importance [33][34][35][36]. Unfortunately, standard divergence-conforming bases, including the higherorder versions, have difficulties in modeling this phenomenon efficiently [37].…”

Section: Introductionmentioning

confidence: 99%

“…Unfortunately, standard divergence-conforming bases, including the higherorder versions, have difficulties in modeling this phenomenon efficiently [37]. In turn, slow convergence in the scattering and absorption spectra in the resonance domain has been reported with respect to the number of degrees of freedom [21,36]. It is clear that a better representation of the singular field quantities is needed.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced discretization of surface integral equations for resonant scattering analysis of sharp-edged plasmonic nanoparticles

et al. 2019

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The surface integral equation (SIE) method, discretized with the method of moments, is a well-established methodology for the scattering analysis of subwavelength plasmonic nanoparticles. SIEs are usually discretized with low-order basis functions that preserve the normal continuity of the surface currents across the edges arising in the meshed boundary, such as Rao-Wilton-Glisson (RWG) functions. However, the plasmonic enhancement modeling on sharp-edged particles is an extremely challenging task, especially due to the singular fields exerted at sharp corners, exposing a slow (or no) convergence in the computation of the scattering and absorption spectra. In this paper, we propose an alternative discretization strategy based on a discontinuous basis function set in conjunction with a volumetric-tetrahedral testing scheme. We demonstrate the potential of the proposed discretization scheme by studying scattering and absorption spectra of three canonical plasmonic polyhedra, i.e., a hexahedral, an octahedral, and a tetrahedral silver inclusion. The results expose an improved accuracy and faster convergence in both far-field and near-field regions when compared to the standard RWG implementation. The proposed discretization scheme can offer faster and more accurate routes towards the exploration and design of the plasmonic resonant spectrum of sharp-edged nanoparticles and nanoantennas.

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Section: Plasmonic Octahedronmentioning

confidence: 99%

“…The electromagnetic response of a hexahedron, or commonly known as the cube, has been studied intensively during the last 50 years (see [36] and references therein). From Fig.…”

Section: Plasmonic Hexahedron (Cube)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Enhanced discretization of surface integral equations for resonant scattering analysis of sharp-edged plasmonic nanoparticles

et al. 2019

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“…However, the limited exploitation of this material is mainly due to the difficulty in applying conventional top‐down fabrication methods to TiO 2 . Additionally, such approaches do not allow the preparation of spherical resonators, which may be interesting for many applications with effective metamaterials, such as beam steering and back‐scattering‐free optics, enhanced light extraction, resonant transmission, manipulation with optical tweezers light detectors directional Fano resonances, and much more.…”

Section: Introductionmentioning

confidence: 99%

Titania‐Based Spherical Mie Resonators Elaborated by High‐Throughput Aerosol Spray: Single Object Investigation

Checcucci

Bottein

Claude

et al. 2018

Adv Funct Materials

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The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10. 1002/adfm.201801958. tives to replace complex and bulky optical elements. This unique ability is due to strong modifications of the local density of optical states occurring in sub-micrometric objects made of materials featuring high dielectric constant and sufficiently small absorption losses.Most studies over the last years have mainly addressed silicon- [4][5][6][7][8][9][10] and germanium-based [11][12][13][14] Mie resonators, demonstrating that they could outperform their metallic counterpart supporting localized plasmonic resonances. However, the large absorption of group IV semiconductor compounds at short wavelengths induces strong optical losses, limiting their potential applicability as efficient devices especially at blue and near-UV frequencies [15,16] (e.g. at 450 nm: n Si = 4.5, k Si = 0.13; n Ge = 4.0, k Ge = 2.24). Furthermore, with a few exception based on colloids [4,17,18] and solid state dewetting, [13,[19][20][21][22][23] typical nanofabrication methods of Si(Ge)-based Mie resonators rely on top-down technologies that are not easy to scale-up at affordable prices.TiO 2 -based optical devices are an interesting alternative to Si, since Titania has a relatively high refractive index and is fully transparent up to UV frequencies [24,25] (e.g.: at 450 nm: n TiO2 = 2.55, k TiO2 = 1.2 × 10 −5 ; at 370 nm: n TiO2 = 2.83, k TiO2 = 1 × 10 −3 ) rendering it, for instance, a strategic material to manipulate the light emitted by conventional GaN-based blue LEDs (at about 450 nm). TiO 2 can be prepared by high-throughput chemical processes, which is a prerequisite for applications requiring large surface systems. It also has many other advantages over Si and metals that are its high chemical, mechanical, and thermal stability, nontoxicity, and relative natural abundance.To date, several groups have studied the properties of Titania particles as dielectric resonators prepared using conventional top-down microfabrication technologies [26][27][28][29][30] or soft-nanoimprint lithography. [31,32] They all confirmed that electromagnetic resonances could be generated within these metal oxide objects. However, the limited exploitation of this material is mainly due to the difficulty in applying conventional top-down fabrication methods to TiO 2 . Additionally, such approaches do not allow the preparation of spherical resonators, [33] which may be interesting for many applications with effective metamaterials, such as beam steering and back-scattering-free optics, [11,[34][35][36][37][38][39][40][41][42][43][44][45]

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Spontaneous Radiation Amplification in a Microsphere‐Coupled CsPbBr₃ Perovskite Vertical Structure

Yan

Yang

Liu

et al. 2021

Advanced Optical Materials

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Microsphere (MS) cavities hold great potential in nanophotonics due to their extraordinary optical properties. All‐inorganic trihalide perovskites with high environmental stability and easy‐for‐preparation have shown great promise for the next‐generation optoelectronic nanodevices. Unfortunately, the nonradiative recombination of exciton is inevitably aggravating the photoluminescence quantum yields (PLQYs). Here, a microsphere‐coupled CsPbBr3 perovskite vertical structure is proposed for amplification of spontaneous radiation (SR) up to 190‐fold. The mechanisms of SR amplification by an MS cavity are completely revealed, for the first time, including Mie focusing (MF) for energy harvesting, directional antenna (DA) for emission convergence, and whispering‐gallery modes (WGMs) for regulation of exciton dynamics. The temperature‐dependent photoluminescence (PL) spectra clarify the contributions of WGMs for the boosting of SR decay and suppression of exciton–phonon interactions for giant PL enhancement. Furthermore, a straightforward approach is presented for a selective MS array capped on a perovskite microcrystal (PeMC) film as a vertical structure for patterned PL enhancement. The excitation‐power‐ and excitation‐observation‐angle‐dependent luminescence contrast inspire a novel anticounterfeiting strategy. The vertical architecture not only advances the understanding of microcavity‐based SR amplification from PeMCs, but also offers opportunities to facilitate the synergistic manipulation of optical fields and exciton–phonon interactions for developing high‐efficient optoelectronic devices.

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Study of Plasmonic Resonances on Platonic Solids

Cited by 6 publications

References 51 publications

Enhanced discretization of surface integral equations for resonant scattering analysis of sharp-edged plasmonic nanoparticles

Enhanced discretization of surface integral equations for resonant scattering analysis of sharp-edged plasmonic nanoparticles

Titania‐Based Spherical Mie Resonators Elaborated by High‐Throughput Aerosol Spray: Single Object Investigation

Spontaneous Radiation Amplification in a Microsphere‐Coupled CsPbBr₃ Perovskite Vertical Structure

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Study of Plasmonic Resonances on Platonic Solids

Cited by 6 publications

References 51 publications

Enhanced discretization of surface integral equations for resonant scattering analysis of sharp-edged plasmonic nanoparticles

Enhanced discretization of surface integral equations for resonant scattering analysis of sharp-edged plasmonic nanoparticles

Titania‐Based Spherical Mie Resonators Elaborated by High‐Throughput Aerosol Spray: Single Object Investigation

Spontaneous Radiation Amplification in a Microsphere‐Coupled CsPbBr3 Perovskite Vertical Structure

Contact Info

Product

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About

Spontaneous Radiation Amplification in a Microsphere‐Coupled CsPbBr₃ Perovskite Vertical Structure