2017/02/24 by Xudong Fan, Xu-Dong Fan, Yi-Fan Zhu +5 · 22 citations
Engineering · Materials Science · Physics and Astronomy · #Acoustic Wave Phenomena Research #Dipole #Magnetic monopole #Metamaterials and Metasurfaces Applications #Microwave Engineering and Waveguides #Physics #Quantum mechanics #physics.class-ph
paper · pdf · doi:10.1103/physrevapplied.9.034035
published in Physical Review Applied 9(3) (American Physical Society)
arxiv created 2017/02/24 · openalex publication_date 2018/03/30 · arxiv updated 2018/04/04 · openalex created_date 2020/11/23 · openalex updated_date 2026/07/22
Directional emission of sound waves is critical in imaging and communication, yet is held back by the inefficient emission of a small source. This study designs a hybrid resonant structure that converts a monopole emission to a dipole field, improving efficiency while maintaining subwavelength dimensions for the source. The design scheme also enables the flexibility of tuning the working frequency by adjusting the structure's geometrical parameters. This work offers a practical path toward miniaturization in applications that demand efficient emission, such as sonar, loudspeakers, or ultrasound transducers.