Observation of Topological Edge Modes in a Quasiperiodic Acoustic Waveguide

Authors

David J. Apigo, New Jersey Institute of Technology
Wenting Cheng, New Jersey Institute of Technology
Kyle F. Dobiszewski, New Jersey Institute of Technology
Emil Prodan, Yeshiva University
Camelia Prodan, New Jersey Institute of Technology

Document Type

Article

Publication Date

3-8-2019

Abstract

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 localized in the middle of a breathable waveguide are engineered by a simple patterning of the walls.

Identifier

85063008983 (Scopus)

Publication Title

Physical Review Letters

External Full Text Location

https://doi.org/10.1103/PhysRevLett.122.095501

e-ISSN

10797114

ISSN

00319007

PubMed ID

30932547

Issue

9

Volume

122

Fund Ref

W. M. Keck Foundation

Recommended Citation

Apigo, David J.; Cheng, Wenting; Dobiszewski, Kyle F.; Prodan, Emil; and Prodan, Camelia, "Observation of Topological Edge Modes in a Quasiperiodic Acoustic Waveguide" (2019). Faculty Publications. 7730.
https://digitalcommons.njit.edu/fac_pubs/7730