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Proceedings Paper

3D mechanical metamaterials with a twist (Conference Presentation)
Author(s): Tobias Frenzel; Muamer Kadic; Martin Wegener

Paper Abstract

Optical activity is a well-established phenomenon. It means that the eigenstates are chiral, leading to a polarization rotation for incident linearly polarized light. Here we investigate the counterpart of optical activity in mechanics, namely “mechanical activity”(or phononic activity) in tailored 3D microstructured metamaterials. In the static regime, the simple-cubic chiral metamaterials exhibit a twist upon pushing onto them – a degree of freedom that is forbidden in ordinary (Cauchy) continuum mechanics. In the dynamic regime, we find a splitting of the lowest two bands, which is most pronounced near the middle of the first Brillouin zone, and chiral eigenstates.

Paper Details

Date Published: 14 March 2018
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Proc. SPIE 10541, Photonic and Phononic Properties of Engineered Nanostructures VIII, 105411U (14 March 2018); doi: 10.1117/12.2297187
Show Author Affiliations
Tobias Frenzel, Karlsruher Institut für Technologie (Germany)
Muamer Kadic, Karlsruher Institut für Technologie (Germany)
Martin Wegener, Karlsruher Institut für Technologie (Germany)


Published in SPIE Proceedings Vol. 10541:
Photonic and Phononic Properties of Engineered Nanostructures VIII
Ali Adibi; Shawn-Yu Lin; Axel Scherer, Editor(s)

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