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Experimental demonstration of topological waveguiding in elastic plates with local resonators
- Source :
- New J. Phys. 20 113036 (2018)
- Publication Year :
- 2018
-
Abstract
- It is recent that the emergence of topological insulators in condensed matter physics has inspired analogous wave phenomena in mechanical systems, mostly in the setting of discrete lattice models. Here we report a numerical and experimental demonstration of topological waveguiding in a continuum plate. We take a ubiquitous design of a bolted elastic plate and show that such a design allows us to invoke the pseudo-spin Hall effect at remarkably low frequencies. We harness the complex interaction of the bolts and the plate to show the existence of a pair of double Dirac cones near the resonant frequency of the bolt. The manipulation of bolted patterns results in the opening of multiple topological bandgaps, including a complete bandgap that forbids all plate modes. We demonstrate that inside this bandgap, the interface between two topologically distinct zones can guide flexural waves crisply around sharp bends.<br />Comment: 9 pages, 5 figures
- Subjects :
- Condensed Matter - Mesoscale and Nanoscale Physics
Subjects
Details
- Database :
- arXiv
- Journal :
- New J. Phys. 20 113036 (2018)
- Publication Type :
- Report
- Accession number :
- edsarx.1806.00655
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1088/1367-2630/aaeb61