2 papers
physics.app-ph2025
Bound States to the Continuum: Time-varying Spoof Acoustic Surface Waves
E. Paul, G. J. Chaplain, J. Li +2
We develop a theoretical framework for time-modulated acoustic metasurfaces comprising a line array of modulated cavities, and show that bound acoustic surface waves can undergo te…
physics.app-ph2025
Eigenmode-Guided Amplification via Spatiotemporal Active Acoustic Metamaterials
Wai Chun Wong, Greggory Chaplain, Jensen Li
We present a spatiotemporal gain-loss framework for eigenmode steering in coupled acoustic resonators. A cross-coupled gain-loss coefficient links the gain of one resonator to the…