Ultrasonic barrier-through imaging by Fabry-Perot resonance-tailoring panel

Chung Il Park, Seungah Choe, Woorim Lee, Wonjae Choi, Miso Kim, Hong Min Seung () and Yoon Young Kim ()
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Chung Il Park: Seoul National University
Seungah Choe: Seoul National University
Woorim Lee: Seoul National University
Wonjae Choi: Korea Research Institute of Standards and Science (KRISS)
Miso Kim: Sungkyunkwan University (SKKU)
Hong Min Seung: Korea Research Institute of Standards and Science (KRISS)
Yoon Young Kim: Seoul National University

Nature Communications, 2023, vol. 14, issue 1, 1-9

Abstract: Abstract Imaging technologies that provide detailed information on intricate shapes and states of an object play critical roles in nanoscale dynamics, bio-organ and cell studies, medical diagnostics, and underwater detection. However, ultrasonic imaging of an object hidden by a nearly impenetrable metal barrier remains intractable. Here, we present the experimental results of ultrasonic imaging of an object in water behind a metal barrier of a high impedance mismatch. In comparison to direct ultrasonic images, our method yields sufficient object information on the shapes and locations with minimal errors. While our imaging principle is based on the Fabry-Perot (FP) resonance, our strategy for reducing attenuation in our experiments focuses on customising the resonance at any desired frequency. To tailor the resonance frequency, we placed an elaborately engineered panel of a specific material and thickness, called the FP resonance-tailoring panel (RTP), and installed the panel in front of a barrier at a controlled distance. Since our RTP-based imaging technique is readily compatible with conventional ultrasound devices, it can realise underwater barrier-through imaging and communication and enhance skull-through ultrasonic brain imaging.

Date: 2023
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DOI: 10.1038/s41467-023-43675-4

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