We consider the wave-structure coupling between an orbital angular momentum beam and a rapidly rotating disk, to investigate a new configuration exhibiting the wave amplification effect known as rotational superradiance. While initially envisioned in terms of the scattering of an incident wave directed perpendicular to an object's rotation axis, we want to demonstrate in the context of acousto-mechanics that superradiant amplification can also occur with a vortex beam directed parallel to the rotation axis. To test his hypothesis we are currently setting up an experiment to probe a previously unexamined parameter regime in the acoustics of rotating porous media.
