Abstract
Nonlinear implementations of acoustic diodes are inherently nonreciprocal and have received continuous attention from the beginning of the research boom for acoustic diodes. However, all the reported nonlinear schemes usually have the shortcomings such as low transmission ratio, action threshold, lack of stability and cumbersome setups. In the present design, we take advantage of extraordinarily large contact acoustic nonlinearity which is several orders of magnitude stronger than material nonlinearity. It is theoretically found that the spectra of the transmitted wave depend on the contact time. It is proven experimentally that the contact nonlinearity can be tamed by adjusting the driving amplitude, the static stress and the elastic constants of the materials. In order to build a compact acoustic diode, a sub-wavelength filter with a sandwich structure is designed. The total length of the acoustic diode is only three eighths of the incident wavelength. The amplitude-dependent behavior of the device exhibits similarities with electronic diodes. A more than 50% transmission ratio is obtained. A robust, stable, compact, highly efficient and solid-state acoustic diode is realized.
Highlights
Nonlinear implementations of acoustic diodes are inherently nonreciprocal and have received continuous attention from the beginning of the research boom for acoustic diodes
Reciprocity is a fundamental property of the acoustic wave, which means the acoustic wave inherently travels symmetrically in space
Devices of one-way transport for acoustic wave which are called as acoustic diodes, isolators or rectifiers are of great importance in acoustic engineering[1]
Summary
Nonlinear implementations of acoustic diodes are inherently nonreciprocal and have received continuous attention from the beginning of the research boom for acoustic diodes. Due to the efficient rejection effect of the filter for a backward transmission, even at the state of fractions and chaos, the device can still function as an acoustic diode This device does relay on frequency conversion, and results in signal distortion when transmitting through it in the forward direction. Though this may limit its application to some specific areas, there is no doubt that a robust, stable, compact, highly efficient and solid-state acoustic diode has been realized
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
