Abstract
Ultrasound is widely used in various applications, ranging from ultrasound imaging to particle manipulation. Acoustic materials, such as phononic crystal (PC) and metamaterials, are designed to control the propagation and concentration of ultrasound. While traditional metal-based underwater PCs are usually limited to large 2D structures and used for low-frequency sound wave manipulation, it is difficult to reach the ultrasonic frequency region of the order of 1 MHz with cumbersome metallic structures. Here, in this work, we proposed a 3D printed gradient-index phononic crystal (GRIN PC) lens based on the hyperbolic secant index profile. With a huge impedance difference between air and the 3D printing materials, the GRIN PC lens adhered to the ultrasonic transducers can easily manipulate the propagation of acoustic waves and achieve wave focusing. This transparent and flat lens demonstrates the beam focusing in water even at a high frequency. The integration and miniaturization of transducer and lens make particle capture convenient in relevant medical applications.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.