  Recent advances in manipulating droplet emissions from a thin vibrating fluid
using submerged cavities, have introduced an innovative platform for generating
hydrodynamic analogs of quantum and optical systems. This platform unlocks
unique features not found in traditional pilot-wave hydrodynamics, inviting
further exploration across varied physical settings to fully unravel its
potential and limitations as a quantum analog. In this study, we explore how
the recently reported phenomenon of hydrodynamic superradiance is affected when
a single hydrodynamic cavity is taken to interact with a submerged reflective
barrier. Our experimental findings reveal that the presence of a barrier near a
cavity enhances its droplet emission rate, emulating the effect of a second
cavity positioned at twice the distance. Moreover, the system exhibits a
sinusoidal modulation of the emission rate as a function of the distance
between the cavity and its mirror image, echoing the characteristic
superradiance signature observed in optical systems. These findings broaden our
understanding of wave-particle duality in hydrodynamic quantum analogs and
suggest new pathways for replicating quantum behaviors in macroscopic systems.
