Highly Confined Love Waves Modes by Defects States in a Phononic Crystal Based on Holey-SiO2/ST-Cut Quartz Structure

Proceedings

Talbi, Abdelkrim¹  Pernod, Philippe²  Liu, Yu-Xin³ 

[1] Author to whom correspondence should be addressed.;Presented at the Eurosensors 2018 Conference, Graz, Austria, 9–12 September 2018;Univ. Lille, CNRS, Centrale Lille, ISEN, Univ. Valenciennes, UMR 8520 IEMN, LIA LICS/LEMAC, 59650 Lille, France

关键词: phononic crystal;    love waves;    b;    gap;    defect;   

DOI  :  10.3390/proceedings2130729

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

We investigate the properties of highly confined Love modes in a phononic crystal based on an array of holes made in SiO2 deposited on ST-cut Quartz substrate. An optimal choice of the geometrical parameters of the holes enables us to obtain wide stop-bands frequency for shear wave’s modes. The introduction of defect by removing lines of holes leads to nearly flat modes within the band gap and consequently paves the way to implement advanced design of electroacoustic filters and high-performance cavity resonators based on shear wave modes. The calculations are performed using finite element method based on the commercial software (COMSOL-Multiphysics). For transmission spectra, piezoelectric excitations are applied by considering the interdigital transducers, with results corroborating well the band structure predictions and the position of defects modes within the band gap.

【 授权许可】

CC BY