Efficient acoustic energy transfer based on coupled systems with parallel cavities

In this work, a coupled acoustic system with parallel cavities is designed by adopting the technique of adiabatic passage. The required space-varying coupling strengths between adjacent cavities can be modulated by meticulously customizing the slit heights along the propagation direction, and efficient energy transfer is realized from one cavity to another. Meanwhile, one-way energy transfer behavior is achieved as well by utilizing a lossy cavity to serve as an intermediate connector of the coupler. Moreover, an available method to optimize the coupling actions is adopted to further reduce the device width so as to achieve desirable energy transfer in a compact configuration. Our work provides an efficient approach for acoustic energy transfer between desired cavities, which may have potential applications in acoustic communication, detection, and filtering.