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arXiv · 1608.06853

Inverse design of high-Q wave filters in two-dimensional phononic crystals by topology optimization

Hao-Wen Dong·Yue-Sheng Wang·Chuanzeng Zhang
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Abstract

Topology optimization of a waveguide-cavity structure in phononic crystals for designing narrow band filters under the given operating frequencies is presented in this paper. We show that it is possible to obtain an ultra-high-Q filter by only optimizing the cavity topology without introducing any other coupling medium. The optimized cavity with highly symmetric resonance can be utilized as the multi-channel filter, raising filter and T-splitter. In addition, most optimized high-Q filters have the Fano resonances near the resonant frequencies. Furthermore, our filter optimization based on the waveguide and cavity, and our simple illustration of a computational approach to wave control in phononic crystals can be extended and applied to design other acoustic devices or even opto-mechanical devices.

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Hao-Wen Dong, Yue-Sheng Wang, Chuanzeng Zhang. 2016-08-24. Inverse design of high-Q wave filters in two-dimensional phononic crystals by topology optimization. https://doi.org/10.1016/j.ultras.2016.12.018

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