Degenerate modes of operation in lithium niobate sensors
Degenerate modes of operation in lithium niobate sensors
复制标题
DOI：
10.1109/icsens.2015.7370487
复制
发表时间：
2015-11
期刊：
影响因子：
--
通讯作者：
Z. Al-Shibaany;J. Hedley;Zhongxu Hu
中科院分区：
文献类型：
--
作者：
Z. Al-Shibaany;J. Hedley;Zhongxu Hu
锂的特性使其成为机电传感器的理想选择，因此在声表面波器件中得到了广泛的应用。然而，它的三角晶体结构使得它很难设计基于简并双频操作的传感器，如陀螺仪和简并模式生物传感器。这项工作着眼于如何优化传感器的几何形状，以补偿锂的碳酸盐材料特性的不对称性。探讨了晶体取向对膜片谐振器结构振动频率的影响，并提出了设计几何形状。理论工作确定适当的晶体取向和传感器的几何形状恢复模态简并。
The properties of lithium niobate make it an ideal choice for electromechanical sensors and it has therefore seen extensive use in surface acoustic wave devices. However, its trigonal crystal structure makes it difficult to design sensors based on degenerate dual frequency operation such as gyroscopes and degenerate mode biosensors. This work looks at how sensor geometry may be optimized to compensate for the asymmetry in the lithium niobate material properties. The effect of crystal orientation on the frequencies of vibration of a diaphragm resonator structure is explored and design geometries proposed. The theoretical work identifies appropriate crystal orientations and sensor geometries to restore modal degeneracy.