二维声子晶体双向反射光栅反射率的计算方法

Proceedings of the 2014 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications Pub Date : 2014-12-29 DOI:10.1109/SPAWDA.2014.6998612

Ce Yuan, Hong-lang Li, Jin-ling Chen, Wen-jia Tian, Yahui Tian, S. He

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引用次数: 0

摘要

基于二维压电声子晶体(PCs)的反射光栅作为一种新型结构，已经进行了多年的研究。本文提出了一种分析该反射光栅在两个方向上反射率的方法。该方法首先利用商用软件COMSOL Multiphysics，采用三维有限元法(FEM)进行了共振模态分析，该方法精度高，适用于二维pc结构。通过共振模态分析，可以得到反射率。结果表明，二维反射光栅在x方向上的反射率是一维反射光栅的2.2倍，在y方向上的反射率是一维反射光栅的5.6倍。结果表明，二维pc反射光栅可用于SAW谐振器，以提高其性能。二维pc在声表面波谐振器上的应用还有待进一步研究。

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An approach to calculate reflectivity of the 2-D phononic crystals reflecting gratings in two directions

As a new structure, reflecting gratings based on two-dimensional (2-D) piezoelectric phononic crystals (PCs) have been studied for several years. This paper has proposed an approach to analyze the reflectivity of this reflecting grating in two directions. In the method, resonant modal was firstly analyzed with three-dimensional (3-D) finite element method (FEM) using the commercial software COMSOL Multiphysics, which was accurate and be suitable for 2-D PCs structures. With the resonant modal analysis, reflectivity can be obtained. The results show that the reflectivity of the 2-D reflecting grating is 2.2 times higher than 1-D reflecting grating in the x direction and 5.6 times in the y direction. These results demonstrate that the 2-D PCs reflecting grating can be used in SAW resonators to improve their performances. More researches are to be done to apply the 2-D PCs on the SAW resonators.

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Proceedings of the 2014 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications

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