Reinbold Janet, Frenzel Tobias, Münchinger Alexander, Wegener Martin
Institute of Applied Physics, Karlsruhe Institute of Technology, 76128 Karlsruhe, Germany.
Institute of Nanotechnology, Karlsruhe Institute of Technology, 76021 Karlsruhe, Germany.
Materials (Basel). 2019 Oct 28;12(21):3527. doi: 10.3390/ma12213527.
On the occasion of this special issue, we start by briefly outlining some of the history and future perspectives of the field of 3D metamaterials in general and 3D mechanical metamaterials in particular. Next, in the spirit of a specific example, we present our original numerical as well as experimental results on the phenomenon of acoustical activity, the mechanical counterpart of optical activity. We consider a three-dimensional chiral cubic mechanical metamaterial architecture that is different from the one that we have investigated in recent early experiments. We find even larger linear-polarization rotation angles per metamaterial crystal lattice constant than previously and a slower decrease of the effects towards the bulk limit.
在本期特刊中，我们首先简要概述一下三维超材料领域，特别是三维机械超材料领域的一些历史和未来展望。接下来，本着具体实例的精神，我们展示了关于声学活性现象（光学活性的力学对应物）的原始数值和实验结果。我们考虑一种三维手性立方机械超材料结构，它不同于我们在近期早期实验中所研究的结构。我们发现，每超材料晶格常数的线性偏振旋转角比以前更大，并且随着向体极限趋近，这种效应的下降速度更慢。
