Parabolic Metamaterials and Dirac Bridges
Materials Science
2016-09-21 v1
Abstract
A new class of multi-scale structures, referred to as `parabolic metamaterials' is introduced and studied in this paper. For an elastic two-dimensional triangular lattice, we identify dynamic regimes, which corresponds to so-called `Dirac Bridges' on the dispersion surfaces. Such regimes lead to a highly localised and focussed unidirectional beam when the lattice is excited. We also show that the flexural rigidities of elastic ligaments are essential in establishing the `parabolic metamaterial' regimes.
Cite
@article{arxiv.1512.01545,
title = {Parabolic Metamaterials and Dirac Bridges},
author = {D. J. Colquitt and N. V. Movchan and A. B. Movchan},
journal= {arXiv preprint arXiv:1512.01545},
year = {2016}
}
Comments
14 pages, 4 figures