Abstract
This study introduces the complete investigation and design procedure of a two-dimensional fluid/fluid phononic crystal structure that operates as an acoustic wave demultiplexer and switch. The designed phononic crystal is made of a periodic array – consisting ethyl nonafluorobutyl ether cylindrical rods - embedded in a mercury background. Also, presented demultiplexer-switch structure includes four different cavities, which have improved dual separating and switching performances. The finite element method has been used to calculate the designed phononic crystal band diagrams and corresponding transmission spectrums. The acoustic demultiplexer can also operate as ultrasonic wave switch, as a result of the proposed structure material dependence to temperature. To the best of our knowledge, this is the first two-dimensional fluid/fluid phononic crystal structure proposed for ultrasonic switch-demultiplexer dual applications with temperature control.
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