Ultrasound experiments on acoustical activity in chiral mechanical metamaterials

Here, the authors report an effect analogous to optical activity in a 3D mechanical micro-lattice composed of chiral unit cells. They spatiotemporally resolve the motion of metamaterial beams at ultrasonic frequencies with nanometric precision and show up to 22° polarization rotation per unit cell.

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Auteurs principaux: Tobias Frenzel, Julian Köpfler, Erik Jung, Muamer Kadic, Martin Wegener
Format: article
Langue:EN
Publié: Nature Portfolio 2019
Sujets:
Q
Accès en ligne:https://doaj.org/article/7ab8a74b5b294f809571b611c8b2588f
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