Acoustic rainbow trapping by coiling up space

نویسندگان

  • Xu Ni
  • Ying Wu
  • Ze-Guo Chen
  • Li-Yang Zheng
  • Ye-Long Xu
  • Priyanka Nayar
  • Xiao-Ping Liu
  • Ming-Hui Lu
  • Yan-Feng Chen
چکیده

We numerically realize the acoustic rainbow trapping effect by tapping an air waveguide with space-coiling metamaterials. Due to the high refractive-index of the space-coiling metamaterials, our device is more compact compared to the reported trapped-rainbow devices. A numerical model utilizing effective parameters is also calculated, whose results are consistent well with the direct numerical simulation of space-coiling structure. Moreover, such device with the capability of dropping different frequency components of a broadband incident temporal acoustic signal into different channels can function as an acoustic wavelength division de-multiplexer. These results may have potential applications in acoustic device design such as an acoustic filter and an artificial cochlea.

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عنوان ژورنال:

دوره 4  شماره 

صفحات  -

تاریخ انتشار 2014