Document Type
Article
Publication Date
7-6-2021
Abstract
We propose, design, and experimentally test a non-Hermitian acoustic superlattice that acts as a tunable precise filter. The superlattice is composed of two concatenated sublattices. The first sublattice is Hermitian, while the other can be adjusted to be Hermitian or non-Hermitian. The existence of non-Hermiticity, in terms of an induced loss in the second sublattice, results in the generation of absorption resonances that appear in the reflected spectrum. This provides us with a powerful knob to absorb or reflect several frequencies at will with high accuracy. The number of filtered frequencies can be controlled by designing the resonances in the first sublattice. Our proposed tunable acoustic filter can be extended to higher-frequency ranges, such as ultrasound, and other areas, such as photonics.
Recommended Citation
Puri, S., J. Ferdous, A. Shakeri, A. Basiri, M. Dubois, and H. Ramezani. 2021. “Tunable Non-Hermitian Acoustic Filter.” Physical Review Applied 16 (1): 014012. https://doi.org/10.1103/PhysRevApplied.16.014012
Publication Title
Physical Review Applied
DOI
10.1103/PhysRevApplied.16.014012
Comments
© 2021 American Physical Society. Original published version available at http://dx.doi.org/10.1103/PhysRevApplied.16.014012