Stable ultrasound sensing by a bilayer surface plasmon resonance type ultrasound sensor

IF 3.4 2区物理与天体物理 Q1 ACOUSTICS

Applied Acoustics Pub Date : 2025-07-23 DOI:10.1016/j.apacoust.2025.110967

Kota Dezao , Ayumi Matsudera , Yuki Harada , Shouta Kitajima , Shuta Kodama , Hayato Ichihashi , Mami Matsukawa

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引用次数: 0

Abstract

The surface plasmon resonance (SPR) ultrasonic receiver is expected to have a flat frequency response in a wide frequency range, making it suitable for broadband ultrasonic detection. The Kretschmann-type SPR receiver is easy to reproduce because it has a simple structure of a glass prism coated by a thin metal layer. For practical application, we tried to prolong the lifetime of the sensor using a bilayer (Au + Ag) coating SPR receiver, making use of the sharp SPR curve of the Ag layer. The receiver successfully measured ultrasound in the MHz range and achieved stable ultrasonic reception for more than one year. The observed waveforms coincided with the waveforms measured by a calibrated conventional ultrasonic transducer. We also focused on the effect of the size and shape of the SPR receiver sensing area because the oblique incidence of the laser beam on the metal layer produces an elliptical sensing area. Introducing the circular and smaller size metal layer increased sensitivity at higher frequencies, illustrating the importance of the measurement area. Finally, we tried to measure ultrasonic waves up to 35 MHz using the bilayer receiver.

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双层表面等离子体共振型超声传感器的稳定超声传感

表面等离子体共振（SPR）超声接收机在较宽的频率范围内具有平坦的频率响应，适用于宽带超声检测。克雷奇曼型SPR接收机结构简单，是一层薄金属涂层的玻璃棱镜，因此易于复制。在实际应用中，我们尝试利用Ag层尖锐的SPR曲线，使用双层（Au + Ag）涂层SPR接收器来延长传感器的使用寿命。该接收机成功测量了MHz范围内的超声波，并实现了一年多的稳定超声接收。所观察到的波形与经校准的常规超声换能器测量到的波形一致。由于激光束在金属层上的斜入射产生椭圆感测区，我们还重点研究了SPR接收器感测区大小和形状的影响。引入圆形和较小尺寸的金属层增加了在更高频率下的灵敏度，说明了测量区域的重要性。最后，我们尝试使用双层接收器测量高达35 MHz的超声波。

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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来源期刊

Applied Acoustics 物理-声学

CiteScore

7.40

自引率

11.80%

发文量

618

审稿时长

7.5 months

期刊介绍： Since its launch in 1968, Applied Acoustics has been publishing high quality research papers providing state-of-the-art coverage of research findings for engineers and scientists involved in applications of acoustics in the widest sense. Applied Acoustics looks not only at recent developments in the understanding of acoustics but also at ways of exploiting that understanding. The Journal aims to encourage the exchange of practical experience through publication and in so doing creates a fund of technological information that can be used for solving related problems. The presentation of information in graphical or tabular form is especially encouraged. If a report of a mathematical development is a necessary part of a paper it is important to ensure that it is there only as an integral part of a practical solution to a problem and is supported by data. Applied Acoustics encourages the exchange of practical experience in the following ways: • Complete Papers • Short Technical Notes • Review Articles; and thereby provides a wealth of technological information that can be used to solve related problems. Manuscripts that address all fields of applications of acoustics ranging from medicine and NDT to the environment and buildings are welcome.