Journal ArticleDOI
Tunable Fano resonances of Lamb modes in a pillared metasurface
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In this article, the authors studied the Fano resonance in a pillared acoustic metasurface, which originates from the avoided crossing of strongly coupled individual monopolar modes of two dissimilar pillars in one unit cell.Abstract:
In this work, Fano resonance is studied in a pillared acoustic metasurface, which originates from the avoided crossing of strongly coupled individual monopolar modes of two dissimilar pillars in one unit cell. The Fano resonance manifests itself as an out-of-phase compressional (monopolar) vibrations of the two pillars coupled through the plate. The Fano asymmetric transmission profile can be analyzed through the interference between the incident wave and the scattered wave emitted by resonant pillars. The peak in the asymmetric transmission is always maintained either the coupling of the two pillars is strong or weak. It is further found that the Fano resonance can be tuned by varying different geometrical parameters, such as the height/diameter of the pillars, the distance between the two pillars, or introducing an inner hole into the pillars which can possibly be filled with a liquid.read more
Citations
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A Review of Tunable Acoustic Metamaterials
TL;DR: In this paper, the authors highlight some recent progress in tunable acoustic metamaterials based on various modulation techniques, which may be exploited for unusual applications compared to conventional acoustic devices.
Journal ArticleDOI
Physics of surface vibrational resonances: pillared phononic crystals, metamaterials, and metasurfaces.
Yabin Jin,Yan Pennec,Bernard Bonello,Hossein Honarvar,Leonard Dobrzynski,Bahram Djafari-Rouhani,Mahmoud I. Hussein +6 more
TL;DR: The history and development of pillared materials are overviewed, a detailed synopsis of a selection of key research topics that involve the utilization of pillars or similar branching substructures in different contexts are provided, and some perspectives on the state of the field are provided.
Journal Article
Probing Thermomechanics at the Nanoscale: Impulsively Excited Pseudosurface Acoustic Waves in Hypersonic Phononic Crystals
Damiano Nardi,Qing Li,K. M. Hoogeboom-Pot,Margaret M. Murnane,Henry C. Kapteyn,Mark E. Siemens,Marco Travagliati,Fulvio Parmigiani,Gabriele Ferrini,Francesco Banfi +9 more
TL;DR: In this paper, a thermomechanics from first-principles is used to calculate the system's initial heat-driven impulsive response and follow its time evolution to quantitatively access frequencies and lifetimes of the composite system's excited eigenmodes.
Journal ArticleDOI
Robustness of conventional and topologically protected edge states in phononic crystal plates
TL;DR: In this article, the robustness of topologically protected and conventional interfaces was analyzed by employing the concept of breaking inversion symmetry within the unit cell of a honeycomb lattice for cylindrical and spherical resonators, respectively, and it was shown that the immunity of the topological protected design requires the interface to be surrounded by at least two hexagons of the phononic crystals on both sides, especially at the sharp corners in the zigzag path, while the conventional design only needs one hexagon of bulk media with the advantage of compact wave transport.
Journal ArticleDOI
Deflecting flexural wave with high transmission by using pillared elastic metasurface
TL;DR: In this paper, a simple elastic metasurface is proposed to abnormally deflect normally and obliquely incident flexural waves, which can support high transmission and full phase control for transmitted waves.
References
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TL;DR: The steep dispersion of the Fano resonance profile promises applications in sensors, lasing, switching, and nonlinear and slow-light devices.
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TL;DR: In this paper, the authors introduce the concept of Fano resonances, which can be reduced to the interaction of a discrete (localized) state with a continuum of propagation modes, and explain their geometrical and/or dynamical origin.
Journal ArticleDOI
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