Isotropic Backward Waves Supported by a Spiral Array Metasurface

Tremain, Ben; Hooper, Ian R.; Sambles, J. R.; Hibbins, Alastair P.

doi:10.1038/s41598-018-25469-7

Cited by 5 publications

(3 citation statements)

References 29 publications

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“…Indeed in electromagnetic metamaterials, such as the Sievenpiper 'mushroom array' [34], there are no geometrical elements that couple beyond the fundamental cell, but inherent competing power channels above (air) and below (hyperbolic media, vias) the structured surface result in regions of negative dispersion within the first Brillouin Zone. Extensions of this are well documented in electromagnetism for both bulk and surface waves [35][36][37][38][39], and for waveguide modes [40]. Similar tailored dispersion relations can arise from other mechanisms, such as chiralinduction in micropolar elastic materials [41], symmetry breaking [42,43] and topology [44,45].…”

mentioning

confidence: 67%

Reconfigurable Elastic Metamaterials: Engineering Dispersion with Meccano$^{\text{TM}}$

Chaplain¹,

Hooper²,

Hibbins³

et al. 2022

Preprint

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We design, simulate and experimentally characterise a reconfigurable elastic metamaterial with beyond-nearest-neighbour (BNN) coupling. The structure is composed from the popular British model construction system, Meccano ™ . The Meccano ™ metamaterial supports backwards waves with opposite directions of phase and group velocities. We experimentally verify three distinct configurations and acoustically infer their spatial vibration spectra.

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mentioning

confidence: 67%

Reconfigurable Elastic Metamaterials: Engineering Dispersion with Meccano$^{\text{TM}}$

Chaplain¹,

Hooper²,

Hibbins³

et al. 2022

Preprint

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“…Due to the different dipole resonance responses along with two fundamental directions of the V-shape plasmonic antennas, the phase shift can be introduced between two perpendicular polarization components of the scattering light. Recently, many different metamaterial designs have been demonstrated, including the asymmetric split rings [154], anisotropic plasmonic antennas [155], chiral plasmonic structures such as 3D helix structures [156], planars [157,158], spiral structures [159][160][161], nanoslits [162]; and dielectric metamaterials such as crossed-bowtie nanoantennas [163], honeycomb structures [164], Mie resonance based asymmetric transmission structures [165], and photonic crystal by breaking the in-plane inversion symmetry (to note that in ref. [166], the authors claimed the broken of C2 symmetry, however, they corrected it as broken of in-plane inversion symmetry in ref.…”

Section: Chiral Effectsmentioning

confidence: 99%

Engineering photonic environments for two-dimensional materials

Youngblood

Liu

et al. 2020

Nanophotonics

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A fascinating photonic platform with a small device scale, fast operating speed, as well as low energy consumption is two-dimensional (2D) materials, thanks to their in-plane crystalline structures and out-of-plane quantum confinement. The key to further advancement in this research field is the ability to modify the optical properties of the 2D materials. The modifications typically come from the materials themselves, for example, altering their chemical compositions. This article reviews a comparably less explored but promising means, through engineering the photonic surroundings. Rather than modifying materials themselves, this means manipulates the dielectric and metallic environments, both uniform and nanostructured, that directly interact with the materials. For 2D materials that are only one or a few atoms thick, the interaction with the environment can be remarkably efficient. This review summarizes the three degrees of freedom of this interaction: weak coupling, strong coupling, and multifunctionality. In addition, it reviews a relatively timing concept of engineering that directly applied to the 2D materials by patterning. Benefiting from the burgeoning development of nanophotonics, the engineering of photonic environments provides a versatile and creative methodology of reshaping light–matter interaction in 2D materials.

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“…The study of most microwave devices requires a remarkable knowledge of the physical characteristics of electromagnetic waves when they propagate in structures. These electromagnetic characteristics are often reflection, transmission, refraction, radiation, diffraction and also absorption [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

New Metamaterial Absorber Based on Electromagnetic Coupling of Triangular SRR and Square SRRs for X-Band RADAR Applications

Berka

Bouguenna

Bendaoudi

et al. 2021

Preprint

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In this paper, a new metamaterial absorber (MA) is presented. The proposed absorber is a microwave structure constituted by a network of four split ring resonators (SRRs) of magnetic resonance and negative permeability (µ < 0); one resonator SRR central for triangular shape and three others resonators SRRs of the same square shape and the same dimensions. All resonators SRRs are printed on the upper surface of the FR4_Epoxy substrate (εr = 4.4; τgδ = 0.02), its dimensions are chosen to obtain the resonance in the X-band frequency. To eliminate the transmission, we add a copper conductive metal plate that will be etched on the upper face of the same substrate. The proposed MA is optimized for dimensions of (27.9 mm × 32 mm), its electromagnetic characteristics are studied for transverse electric (TE) polarization for different incidences and different inter-resonator spacing. The obtained results with the simulations performed by the high-frequency structure simulator (HFSS) show that our metamaterial absorber still has three peaks of different absorptions estimated at a maximum on the order of 98.76%. The main advantage of this study based on the proposed structure is that it is possible to control its absorption percentage for X-band radar applications.

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Isotropic Backward Waves Supported by a Spiral Array Metasurface

Cited by 5 publications

References 29 publications

Reconfigurable Elastic Metamaterials: Engineering Dispersion with Meccano$^{\text{TM}}$

Reconfigurable Elastic Metamaterials: Engineering Dispersion with Meccano$^{\text{TM}}$

Engineering photonic environments for two-dimensional materials

New Metamaterial Absorber Based on Electromagnetic Coupling of Triangular SRR and Square SRRs for X-Band RADAR Applications

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