Observation of topological edge modes in a quasiperiodic acoustic waveguide
Topological boundary and interface modes are generated in an acoustic waveguide by
simple quasiperiodic patterning of the walls. The procedure opens many topological gaps in
the resonant spectrum and qualitative as well as quantitative assessments of their
topological character are supplied. In particular, computations of the bulk invariant for the
continuum wave equation are performed. The experimental measurements reproduce the
theoretical predictions with high fidelity. In particular, acoustic modes with high Q factors …
simple quasiperiodic patterning of the walls. The procedure opens many topological gaps in
the resonant spectrum and qualitative as well as quantitative assessments of their
topological character are supplied. In particular, computations of the bulk invariant for the
continuum wave equation are performed. The experimental measurements reproduce the
theoretical predictions with high fidelity. In particular, acoustic modes with high Q factors …
Observation of topological edge modes in a quasi-periodic acoustic waveguide
We present a system of acoustic waveguide generated by a simple quasi-periodic patterning
without any additional fine-tuning. The system presents topological edge modes. The
waveguides are characterized experimentally by standard acoustic measurements, and via
a finite element approach utilizing COMSOL Multiphysics. The experimental results and
simulations confirm the existence of topological edge modes in these gaps.
without any additional fine-tuning. The system presents topological edge modes. The
waveguides are characterized experimentally by standard acoustic measurements, and via
a finite element approach utilizing COMSOL Multiphysics. The experimental results and
simulations confirm the existence of topological edge modes in these gaps.
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