학술논문
Metasurface piezoelectric ring element-based planar acoustic ultrasonic transducer with subwavelength focusing beam
Document Type
Conference
Source
2023 Seventeenth International Congress on Artificial Materials for Novel Wave Phenomena (Metamaterials) Artificial Materials for Novel Wave Phenomena (Metamaterials), 2023 Seventeenth International Congress on. :X-136-X-138 Sep, 2023
Subject
Language
ISSN
2573-2706
Abstract
In this study, a new ultrasonic transducer with improved focusing performance was developed using a metasurface piezoelectric ring element optimized through finite element analysis. The metasurface piezoelectric ring element was fabricated by laser processing and packaged with a backing layer, matching layer and housing. The developed planar ultrasonic transducer was tested to generate a subwavelength focusing beam in water. The characteristics of the resonance frequency and frequency bandwidth of the planar ultrasonic transducer were tested. It also measures the 3D shape of the needle-like subwavelength focusing beam of planar ultrasonic transducer in water. This technology is expected to be useful for high-resolution imaging or medical ultrasonic focusing devices in the future.