Decoupling of multiple coupled phononic crystal waveguides: application to acoustic demultiplexing

作者：Zou, Qiushun; Liu, Wenxing; Yu, Tianbao^*; Liu, Nianhua; Wang, Tongbiao; Liao, Qinghua

来源：Journal of Physics D: Applied Physics , 2017, 50(12): 125102.

DOI：10.1088/1361-6463/aa5873

• decoupling
• phononic crystal waveguide
• demultiplexing
• acoustic devices

We show that the decoupling of two coupled phononic crystal waveguides (PnCWs) by a proper design can be achieved. And this decoupling property can be extended to the coupling of any number of parallel coupled PnCWs. The acoustic wavelength for decoupling is insensitive to the number of coupled PnCWs. Decoupling induces the extinction of neighbor PnCWs' power transfer and makes the design of compact acoustic components easier. As a possible application of our work, a new kind of 1-to-2 acoustic demultiplexers are numerically demonstrated by employing the decoupling at the crossing-point frequency in two and three coupled PnCWs. This design concept provides a novel method and compact model for acoustic demultiplexing and can present practical applications in future acoustic wave circuits.

• 出版日期2017-3-29
• 单位南昌大学