Advanced Image Detection through Acoustic Metamaterials: A Novel Approach

Abstract

Image detection plays a crucial role, particularly in medical applications for non-destructive examination. Early developments in image detection relied on high frequencies to produce clearer images, which in turn led to heat generation. Therefore, there is a need for metamaterials capable of image detection at lower frequencies. This study focuses on a three-dimensional (3D) holey-structured metamaterial. The methodology is divided into three key phases: metamaterial design, testing, and performance analysis. Various parameters, including hole size, material type, and metamaterial thickness, are adjusted for comparative performance evaluation. The clearest image at the output plane of the metamaterial was achieved with the smallest hole size of 1.5 mm, while the metamaterial thickness of 130 mm corresponds to the operating wavelength. The device demonstrated optimal performance at a lower frequency of 2.6 kHz.