PRB article selected as Editors' Suggestion

Physical objects create reflections and shadows under incident waves, making them detectable and motivating research on cloaking devices. Here, we use the synchronization of a self-oscillating cavity mode with the incident waves to cancel backscattering and compensate transmission losses from a cavity. This cloak of invisibility concept only requires the addition of a saturable gain to the resonant scatterer. An acoustic experiment demonstrates this quasipassive concept in a one-dimensional waveguide, cloaking an obstacle by simply tuning the saturable gain.
Here is the link to our paper: external page Cloaking obstacles using synchronization