Acoustic spoof surface plasmon polaritons for filtering, isolation and sensing

Janković, Nikolina; Ilić, S.; Bengin, Vesna; Birgermajer, Slobodan; Radonić, Vasa; Alù, Andrea

doi:10.1016/j.rinp.2021.104645

Cited by 8 publications

(4 citation statements)

References 53 publications

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“…Glide symmetry effectively halves the periodicity of the structure, doubling the size of each Brillouin zone. This is evident in the band structure of the system’s eigenmodes, where the degenerate mode is band folded back into the first Brillouin zone 29 , 36 , shown in Fig. 1 e as a dashed line.…”

Section: Resultsmentioning

confidence: 89%

Confined acoustic line modes within a glide-symmetric waveguide

Moore

Ward

Smith

et al. 2022

Sci Rep

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Confined coupled acoustic line-modes supported by two parallel lines of periodic holes on opposite surfaces of a glide-symmetric waveguide have a hybrid character combining symmetric and anti-symmetric properties. These hybrid coupled acoustic line-modes have a near constant group velocity over a broad frequency range as no band gap is formed at the first Brillouin zone boundary. We show that the hybrid character of these confined modes is tuneable as a function of the spacing between the two surfaces. Further we explore how the band-gap reappears as the glide symmetry is broken.

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Section: Resultsmentioning

confidence: 89%

Confined acoustic line modes within a glide-symmetric waveguide

Moore

Ward

Smith

et al. 2022

Sci Rep

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“…Under these conditions, an acoustic surface wave (ASW) can be formed, localized at the interface between the metasurface and the surrounding fluid, decaying evanescently from the surface, 22,31,47,48 analogous to electromagnetic spoof-surface plasmons on perfectly conducting patterned substrates. 49,50 In such a system, with a reciprocal lattice vector of size jGj ¼ 2p=k p , the dispersion curves contains a fundamental mode that approaches the first BZB with vanishing group velocity (and well defined asymptotic frequency 20 ) whereby a standing wave is formed along the surface due to Bragg scattering. 51 Crucially the cavity feature size is sub-wavelength with respect to the free-space acoustic wave at the same frequency.…”

Section: B Acoustic Waveguides With Metamaterials Conceptsmentioning

confidence: 99%

Acoustic metasurfaces with Frieze symmetries

Moore,

Starkey,

Chaplain

2024

The Journal of the Acoustical Society of America

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Frieze patterns follow a set of tiling instructions including reflection, rotation, and translation, and tile the infinite strip. Many metamaterials function due to the underlying symmetry, and its strategic breaking, of their constituent sub-structures that allow tailoring of the dispersion of modes supported by the structure. We design, simulate, and experimentally characterize seven one-dimensional acoustic metasurfaces whose unit cells each belong to one of the distinct Frieze groups.

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“…1 In the past, SPPs were studied only in the visible or ultraviolet (UV) frequency band but in 2014 Pendry et al proposed a subwavelength structure consisting of square hole arrays to produce the dispersion analogous to the natural SPPs at microwave frequency; such an electromagnetic response is called the spoof SPPs. The concept of spoof SPPs helps to miniaturize the integrated circuits and enhance the field confinement, which helps in many potential applications in lasing, 2 filters, 3 waveguides, 4 devices, 5 and sensing, 6,7 and so on.…”

Section: Introductionmentioning

confidence: 99%

High Q‐factor anapole mode based on localized spoof surface plasmon polaritons

Ahmed

Qin

2022

Micro & Optical Tech Letters

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Recently, localized spoof surface plasmon polaritons (LSSPPs) have emerged as a new research frontier due to their unique properties and potential applications in integrated circuits. The toroidal dipole is a localized electromagnetic response different from electric and magnetic dipoles. Anapole is the nonradiating source produced by the interference between identical radiation patterns of toroidal and electric dipoles in the far field. This paper proposes a novel high Q-factor compact planar resonator consisting of split-ring resonators to support the LSSPPs anapole at microwave frequency, which shows an apparent nonradiating charge-current configuration. In simulation and measurement, we observe the nonradiating property of the anapole mode. Further, we demonstrate that the LSSPPs anapole resonance has the tunable property, which is very sensitive to structural changes. These might lead to potential applications in the design of plasmonic deformation sensors, cloaking, and absorbers.

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Acoustic spoof surface plasmon polaritons for filtering, isolation and sensing

Cited by 8 publications

References 53 publications

Confined acoustic line modes within a glide-symmetric waveguide

Confined acoustic line modes within a glide-symmetric waveguide

Acoustic metasurfaces with Frieze symmetries

High Q‐factor anapole mode based on localized spoof surface plasmon polaritons

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