Longitudinal-Twist Wave Converter based on Chiral Metamaterials

Lemkalli, Brahim; Kadic, Muamer; Badri, Youssef El; Guenneau, Sébastien; Mir, Abdellah; Achaoui, Younes

doi:10.48550/arxiv.2211.03222

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2023

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“…This converts the linear polarization of a transverse wave to circular polarization 10 . Recently, twisting metamaterials demonstrated the conversion of longitudinal waves into twist waves 11,12 .…”

Section: Introductionmentioning

confidence: 99%

The emergence of low-frequency dual Fano resonances in chiral twisting metamaterials

Lemkalli¹,

Kadic²,

Badri³

et al. 2023

Preprint

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In the current work, through a finite element analysis, we demonstrate that a configuration of chiral cells having syndiotactic symmetry provides dual Fano resonances at low frequency. From the phononic dispersion and transmission response, we compare the signature provided by a composite made of chiral cells to the ones of homogeneous medium, isotactic nonchiral, and isotactic chiral beams. The study results in an innovative design of a mechanical metamaterial that induces the Fano resonance at low frequency with a relatively high quality factor. This might be a significant step forward for mechanical wave filtering and detection. Performances have been evaluated using a sensor that will be implemented as a thermometer.

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Section: Introductionmentioning

confidence: 99%