衰减
声表面波
材料科学
生物传感器
声学
灵敏度(控制系统)
光电子学
共振(粒子物理)
表面波
爱的波浪
纳米技术
光学
物理
电子工程
工程类
波传播
机械波
原子物理学
纵波
作者
J. Bonhomme,Mourad Oudich,Mohamed Bellaredj,Jean-François Bryche,Pedro Alberto Segura Chavez,D. Beyssen,Paul G. Charette,Frederic Sarry
出处
期刊:Physical review applied
[American Physical Society]
日期:2022-06-13
卷期号:17 (6)
被引量:4
标识
DOI:10.1103/physrevapplied.17.064024
摘要
Surface-acoustic-wave (SAW) sensors have undergone outstanding developments during the last decades. However, for biosensing applications, they struggle to compete with optical sensing technologies. In this work, we present a Love-wave-based sensing platform that leverages the use of the local resonances of micropillars fabricated on the surface of the guiding layer. We demonstrate numerically and experimentally that the Love-wave interaction with the micropillars produces sharp attenuation dips in the transmission spectrum. These dips are associated with the excitations of flexural and torsional resonance modes of the pillars. We utilize these modes to achieve higher detection sensitivity of temperature variation and mass loading using sugar and microbeads concentrations in aqueous solutions. Integrating a lattice of micropillars into SAW-based devices offers a strong potential for detecting low particles concentrations.
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