Acoustic Coherent Perfect Absorbers as Sensitive Null Detectors

12 Oct 2016 Meng Chong Zhang Xiaonan Tang Suet To Yang Min Yang Zhiyu

We report the experimental realization of acoustic coherent perfect absorption (CPA) of four symmetric scatterers of very different structures. The only conditions necessary for these scatterers to exhibit CPA are that both the reflection and transmission amplitudes of the scatterers are 0.5 under one incident wave, and there are two collinear and counter-propagating incident waves with appropriate relative amplitude and phase... (read more)

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