Linear and Planar Periodic Arrays of Metallic Nanospheres: Fabrication, Optical Properties and Applications

Campione, Salvatore; Capolino, Filippo

doi:10.1142/9789814355193_0005

Cited by 9 publications

(23 citation statements)

References 146 publications

(186 reference statements)

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“…Likewise, mode propagation in 1D periodic arrays of nanospheres has been analyzed in [21,[29][30][31][32][33][34][35], and broader analyses of 1D periodic arrays of isotropic nanoscatterers and radiators in [36][37][38][39][40]. A review of the state of the art of linear and planar arrays of plasmonic nanospheres has recently been presented in [41]. Despite these extensive studies, several difficulties are still encountered in the analysis and, especially, the interpretation and the characterization of mode propagation in periodic plasmonic structures composed of metal nanospheres.…”

Section: Introductionmentioning

confidence: 99%

Characterization of complex plasmonic modes in two-dimensional periodic arrays of metal nanospheres

et al. 2011

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Two-dimensional periodic arrays of noble metal nanospheres support a variety of optical phenomena, including bound and leaky modes of several types. The scope of this paper is the characterization of the modal dispersion diagrams of planar arrays of silver nanospheres, with the ability to follow individual modal evolutions. The metal spherical nanoparticles are described using the single dipole approximation technique by including all the retarded dynamic field terms. Polarizability of the nanospheres is provided by the Mie theory. Dispersion diagrams for both physical and nonphysical modes are shown for a square lattice of Ag nanospheres for the case of lossless and lossy metal particles, with dipole moments polarized along the x, y, and z directions. Though an array with one set of parameters has been studied, the analysis method and classification are general. The evolution of modes through different Riemann sheets and analysis of guidance and radiation are studied in detail.

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Section: Introductionmentioning

confidence: 99%

Characterization of complex plasmonic modes in two-dimensional periodic arrays of metal nanospheres

et al. 2011

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“…A more detailed formulation and explanation is in [14][15][16][17][18]. Notice that the formulation outlined here is general, and is adopted in the following sections to characterize particular array cases.…”

Section: Mode Analysis In Periodic Arrays Of Nanoparticlesmentioning

confidence: 99%

“…where ee α is the electric polarizability tensor of the nanoparticle, and loc E is the local field acting on it [14][15]. For isotropic nanoparticles (e.g., spherical), the polarizability tensor ee α degenerates into a diagonal matrix with entrance ee α .…”

Section: Mode Analysis In Periodic Arrays Of Nanoparticlesmentioning

confidence: 99%

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Metamaterials based on plasmonic nanoshells and loss-compensation using fluorescent dye molecules and quantum dots

Campione

Capolino

2012

SPIE Proceedings

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Composite materials based on plasmonic nanoparticles allow building metamaterials with very large effective permittivity (positive or negative) or ε-near-zero; moreover, if clustered or combined with other nanoparticles, it is possible to generate also effective magnetic permeability (positive or negative), and an ad-hoc design would result in the generation of double negative materials, and therefore backward wave propagation. However, losses are usually significant and affect the metamaterial performance. In this work, we report on the possibility of adopting fluorescent dye molecules or quantum dots, optically pumped, embedded into the dielectric cores of the employed nanoshell particles, and provide loss-compensation in ordered 3D periodic arrays at optical frequencies. Each spherical nanoshell is modeled as an electric dipole. We consider nanoparticles with gold and silver shells. We then find the modes with complex wavenumber in the metamaterial, and describe the composite material in terms of homogenized effective material parameters (refractive index and permittivity). Furthermore, in case of loss-compensation, we compare the results obtained from modal analysis with the ones computed by using two different homogenization methods: (i) Maxwell Garnett homogenization theory and (ii) Nicholson-Ross-Weir retrieval method. We show the design of two ε-near-zero metamaterials with low losses by simulating gain material made of dyes or quantum dots with realistic parameters. A brief discussion about the employment of the two kinds of active gain materials adopted here is given in the end.

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“…is the weight of the nth harmonic [12][13][14]. Each Floquet wave number , has a value very close to the one of the bound mode in the unperturbed waveguide, and thus it is not radiating.…”

Section: Floquet Theorymentioning

confidence: 99%

An optical leaky wave antenna with silicon perturbations for electronic control

Campione

Song

Boyraz

et al. 2011

Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications V

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An optical leaky wave antenna (OLWA) is a device that radiates a light wave into the surrounding space from a leaky wave (LW) guided mode or receives optical power from the surrounding space into a guided optical mode. In this work, we propose and provide a 3D analysis of a novel CMOS compatible OLWA made of a silicon nitride (Si 3 N 4 ) waveguide comprising periodic silicon perturbations which allow electronic tuning capability. The analysis presented here includes the effect of the number of semiconductor perturbations, the antenna radiation pattern and directivity. We show that the number of the silicon perturbations has to be large to provide a long radiating section required to achieve radiation with high directivity. In other words, the proposed structure allows for a very narrow-beam radiation. Preliminary results are confirmed by exploiting leaky wave and antenna array factor theory, as well as verified by means of two full-wave simulators (HFSS and COMSOL). Our purpose is to ultimately use PIN junctions as building blocks for each silicon implantation for the electronic control of the radiation. In particular, the electronic tunability of the optical parameters of silicon (such as refractive index and absorption coefficient) via current injection renders itself the ideal platform for optical antennas that can facilitate electronic beam control, and boost the efficiency of optoelectronic devices such as light-emitting diodes, lasers and solar cells, and bio-chemical sensors.

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Linear and Planar Periodic Arrays of Metallic Nanospheres: Fabrication, Optical Properties and Applications

Cited by 9 publications

References 146 publications

Characterization of complex plasmonic modes in two-dimensional periodic arrays of metal nanospheres

Characterization of complex plasmonic modes in two-dimensional periodic arrays of metal nanospheres

Metamaterials based on plasmonic nanoshells and loss-compensation using fluorescent dye molecules and quantum dots

An optical leaky wave antenna with silicon perturbations for electronic control

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