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14 March 2018 3D mechanical metamaterials with a twist (Conference Presentation)
Tobias Frenzel, Muamer Kadic, Martin Wegener
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Proceedings Volume 10541, Photonic and Phononic Properties of Engineered Nanostructures VIII; 105411U (2018) https://doi.org/10.1117/12.2297187
Event: SPIE OPTO, 2018, San Francisco, California, United States
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.
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Tobias Frenzel, Muamer Kadic, and Martin Wegener "3D mechanical metamaterials with a twist (Conference Presentation)", Proc. SPIE 10541, Photonic and Phononic Properties of Engineered Nanostructures VIII, 105411U (14 March 2018); https://doi.org/10.1117/12.2297187
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KEYWORDS
Metamaterials
Mechanics
Optical activity
3D microstructuring
Chiral metamaterials
Polarization
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