Mechanism for acoustic leakage in surface-acoustic wave resonators on rotated Y-cut lithium tantalate substrate

被引：15

作者：

Koskela, J ^{[1
]}

Knuuttila, JV ^{[1
]}

Tikka, PT ^{[1
]}

Hartmann, CS ^{[1
]}

Plessky, VP ^{[1
]}

Salomaa, MM ^{[1
]}

机构：

[1] Aalto Univ, Phys Mat Lab, FIN-02015 Espoo, Finland

来源：

APPLIED PHYSICS LETTERS | 1999年 / 75卷 / 17期

关键词：

D O I：

10.1063/1.125117

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We discuss an acoustic loss mechanism in surface-acoustic wave resonators on 36 degrees YX-cut lithium tantalate substrate. Recent acoustic field scans performed with an optical Michelson interferometer reveal a spatially asymmetric acoustic field atop the busbars of a resonator, giving rise to acoustic beams which escape the resonator area and lead to undesired losses. Here, we link the phenomenon with the inherent crystalline anisotropy of the substrate: the shape of the slowness curves and the asymmetry of the polarization for leaky surface-acoustic waves, propagating at an angle with respect to the crystal X-axis. (C) 1999 American Institute of Physics. [S0003-6951(99)01843-4].

引用

页码：2683 / 2685

页数：3

共 6 条

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