Topological resonance behaviors of surface acoustic wave under surface liquid-layer loadings and sensing applications

arXiv - PHYS - Applied Physics Pub Date : 2024-08-08 DOI:arxiv-2408.04468

Bowei Wu, Tingfeng Ma, Shuanghuizhi Li, Boyue Su, Pengfei Kang

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Abstract

In this work, topological resonance behaviors of surface acoustic wave (SAW) under surface liquid-layer loadings are investigated. The results show that through the coupling of waveguide and resonant cavity, a resonant peak with high Q-factor can emerge, and the frequency of which is significantly sensitive to the liquid parameters. Based on that, a topological-resonance SAW liquid-phase sensor is proposed. The results show that the formation of the topological phase transition is closely related to the liquid-layer loading. Furthermore, by changing the thickness of the liquid-layer loading, the operating-frequency range of the device can be significantly expanded, which is vital for biomedical detecting applications. Based on which, the sensing performances of topological-resonance SAW liquid-phase sensor are simulated, which are used to sensing the concentration of albumin and hemoglobin concentration in blood, and high sensitivities and Q-factors can be obtained for this device. The results presented in this paper can provide an important basis for the realization of highly sensitive and stable SAW biomedical sensors in the future.

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表面液层负载下的表面声波拓扑共振行为及传感应用

本文研究了表面声波（SAW）在表面液体层负载下的拓扑共振行为。结果表明，通过波导和谐振腔的耦合，可以产生一个高 Q 因子的谐振峰，其频率对液体参数非常敏感。在此基础上，提出了一种拓扑共振声表面波液相传感器。结果表明，拓扑相变的形成与液层负载密切相关。此外，通过改变液层负载的厚度，可以显著扩大器件的工作频率范围，这对生物医学检测应用至关重要。在此基础上，模拟了拓扑共振声表面波液相传感器的传感性能，用于传感血液中的白蛋白浓度和血红蛋白浓度，该器件可获得较高的灵敏度和 Q 值。本文的研究结果为未来实现高灵敏度、高稳定性的声表面波生物医学传感器提供了重要依据。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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arXiv - PHYS - Applied Physics

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