3 papers
physics.app-ph2025
Realizing non-Hermitian tunneling phenomena using non-reciprocal active acoustic metamaterials
Felix Langfeldt, Joe Tan, Sayan Jana +1
Non-reciprocal systems have been shown to exhibit various interesting wave phenomena, such as the non-Hermitian skin effect, which causes accumulation of modes at boundaries. Recen…
physics.app-ph2025
Supersonic wave propagation in active non-Hermitian acoustic metamaterials
Kangkang Wang, Felix Langfeldt, Chen Shen +4
Obtaining a group velocity higher than the speed of sound in a waveguide is a challenging task in acoustic wave engineering. Even more challenging is to achieve this velocity incre…
physics.app-ph2024
The 2024 Active Metamaterials Roadmap
Simon A. Pope, Diane J. Roth, Aakash Bansal +27
Active metamaterials are engineered structures that possess novel properties that can be changed after the point of manufacture. Their novel properties arise predominantly from the…