Bulk plasmon‐polaritons in hyperbolic nanorod metamaterial waveguides

Vasilantonakis, Nikolaos; Nasir, Mazhar E.; Dickson, Wayne; Wurtz, Gregory A.; Zayats, Anatoly V.

doi:10.1002/lpor.201400457

Cited by 116 publications

(133 citation statements)

References 26 publications

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“…The wire medium metamaterials (WMM) demonstrate unique electromagnetic properties which make them unrivalled for applications in spatially discriminatory and/or frequency-selective optical devices [4][5][6] and also demonstrate the prospects for manufacture of filters, polarizers, etc. [7].…”

Section: Introductionmentioning

confidence: 99%

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Mechanically Tunable Wire Medium Metamaterial in the Millimeter Wave Band

Ivzhenko¹,

Odarenko²,

Tarapov³

2016

PIER Letters

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Abstract-The paper is devoted to experimental and theoretical study of spectra zone characteristics of the wire medium metamaterial with mechanically tunable unit cell. We experimentally demonstrated the effective control possibility of the spectral characteristics of wire medium metamaterial by varying its elementary unit-cell geometry. We established conditions under which the experimental implementation of the wire medium metamaterial at microwaves possesses the properties of a plasma-like medium and the properties band gap structure. A good agreement between the experiment and theory is demonstrated.

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Section: Introductionmentioning

confidence: 99%

“…[7]. Certain practical interest is presented in the possibility of such structures usage in nanoelectronics [5], antenna technology [6] and technologies of transmitting images with a subwavelength resolution [8].…”

Section: Introductionmentioning

confidence: 99%

Mechanically Tunable Wire Medium Metamaterial in the Millimeter Wave Band

Ivzhenko¹,

Odarenko²,

Tarapov³

2016

PIER Letters

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“…On the other hand, hyperbolic metamaterials can be practically realized using relatively simple structures such as an array of nanorods embedded in the substrate material [29][30][31][32] or a metal-dielectric multilayer [33][34][35]. Propagation of high-k waves in the hyperbolic medium has been clearly shown in [36,37].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of the Purcell factor in multiperiodic hyperboliclike metamaterials

et al. 2016

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Spontaneous emission enhancement is theoretically investigated in multiperiodic metal-dielectric multilayers (multiperiodic hyperboliclike metamaterials or photonic hypercrystals) where the unit cell consists of two layers of different dielectrics alternating with identical metallic layers. It is shown that the Purcell factor in such multiperiodic structures exceeds the Purcell factor in ordinary periodic hyperbolic or plasmonic metamaterials by a factor of 4, which in general makes it possible to maximize interaction between emitting centers and nearby plasmonic structures. This enhancement is numerically characterized and shown to be related to the interplay between surface and volume plasmonic excitations in the multilayer metamaterial. We separately identify the influence of proximity between the emitter and the closest metal-dielectric boundary (including the quenching effect and the enhanced coupling of the dipole radiation and surface plasmon polaritons) and the effects related to the structural composition of the hypercrystal. The Purcell-factor modification brought about by placing a cavity layer into a multiperiodic structure was also characterized.

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“…Nanowire arrays have attracted much attention in photovoltaic devices, [1][2][3][4] sensing, 5,6 plasmonics, 7 surface enhanced Raman scattering, 8 high density data storage, 9 photocatalysts, 10 and nanobiotechnology, 11 due to their unique electrical, optical, magnetic, and chemical properties which are different from those in the bulk state. In photovoltaics nanowire arrays are of particular interest for costeffective organic and hybrid solar cells, whose near-optimal architecture is proposed to consist of arrays of nanostructures (approximately 200 nm long).…”

mentioning

confidence: 99%

Uniform Large-Area Free-Standing Silver Nanowire Arrays on Transparent Conducting Substrates

Feng

Kim

Nemitz

et al. 2016

J. Electrochem. Soc.

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Arrays of silver nanowires have received increasing attention in a variety of applications such as surface-enhanced Raman scattering (SERS), plasmonic biosensing and electrode for photoelectric devices. However, until now, large scale fabrication of device-suitable silver nanowire arrays on supporting substrates has seen very limited success. Here we show the synthesis of free-standing silver nanowire arrays on indium-tin oxide (ITO) coated glass by pulsed electrodeposition into anodic aluminum oxide (AAO) templates. We use an in situ oxygen plasma cleaning process and a sputtered Ti layer to enhance the adhesion between the template and ITO glass. An ultrathin gold layer (2 nm) is deposited as a nucleation layer for the electrodeposition of silver. An unprecedented high level of uniformity and control of the nanowire diameter, spacing and length has been achieved. In photovoltaics nanowire arrays are of particular interest for costeffective organic and hybrid solar cells, whose near-optimal architecture is proposed to consist of arrays of nanostructures (approximately 200 nm long).12,13 The major advantage to using nanowire arrays is the enhancement of the charge collection due to the high charge carrier mobility in the metallic and some semiconductor nanowires. 13,14 However, due to the huge junction area, most semiconductor nanowire solar cells face limitations in device performance due to charge recombination across material interfaces, 13,14 leading to poor solar cell performance. Many research groups have tried to address this issue by developing metal oxide core-shell nanowire arrays. [15][16][17] In this work, a conductive metal oxide core (e.g. ZnO) is coated with a shell layer with an offset conduction band (e.g. TiO 2 , Al 2 O 3 ) in order to further increase distance between electron-hole pairs while simultaneously promoting charge extraction along the axis of the nanowire. This phenomenon was further employed in doped TiO 2 core-shell wires to amplify the electron mobility in the core of the wire without forming a recombination center along the internal interface.18 However, to ultimately enhance the performance of organic solar cells, a hybrid core-shell nanostructure with enhanced charge mobilities could provide an optimal electrode, e.g. a Ag nanowire with an inorganic shell layer. Additionally, these wires promote field amplification via plasmonic resonance as well as acting as a light scatterer, 19 leading to an increase in absorption in the surrounding active layers of the organic solar cells.For our approach, we use an industrially-applicable method for producing silver nanowires on a large area via filling anodic aluminum oxide (AAO) templates using electrodeposition. AAO was first introduced as a self-organizing mesoporous structure by Keller et al. in 1953. 20 Much research was later conducted to improve the formation and to fabricate AAO pores with various pore distances and diameters using thick (∼ mm) bulk Al foils. 21 Recently, it has been shown that the production of AAO templates ...

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Bulk plasmon‐polaritons in hyperbolic nanorod metamaterial waveguides

Cited by 116 publications

References 26 publications

Mechanically Tunable Wire Medium Metamaterial in the Millimeter Wave Band

Mechanically Tunable Wire Medium Metamaterial in the Millimeter Wave Band

Enhancement of the Purcell factor in multiperiodic hyperboliclike metamaterials

Uniform Large-Area Free-Standing Silver Nanowire Arrays on Transparent Conducting Substrates

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