Topological modes in radiofrequency resonator arrays
Abstract
Topological properties of solid states have sparked considerable recent interest due to their importance in the physics of lattices with a non-trivial basis and their potential in the design of novel materials. Here we describe an experimental and accompanying numerical toolbox to create and analyze topological states in radiofrequency resonator arrays including non-local coupling. These arrays are very easily constructed, offer a variety of geometric configurations, and their eigenfunctions and eigenvalues are amenable to detailed analysis. They offer well defined analogs to coupled oscillator systems in general in that they are characterized by resonances whose frequency spectra depend on the individual resonators, their interactions, and boundary conditions. A comparison of a small one-dimensional experimental system with theory by means of easy to measure S-parameters shows excellent agreement. The numerical toolbox allows for simulations of arbitrarily large systems, revealing an astonishing richness of band structures under systematic parameter variation.
- Publication:
-
Physics Letters A
- Pub Date:
- March 2020
- DOI:
- 10.1016/j.physleta.2019.126177
- arXiv:
- arXiv:1906.04815
- Bibcode:
- 2020PhLA..38426177V
- Keywords:
-
- Topological modes;
- Radiofrequency resonators;
- Edge modes;
- Magnetic resonance imaging;
- Sensors;
- Physics - Applied Physics;
- Condensed Matter - Mesoscale and Nanoscale Physics
- E-Print:
- doi:10.1016/j.physleta.2019.126177