Diffraction-Limited Focusing of Acoustic Waves by a Mesoscopic Flat Janus Lens

• Published in: JETP letters Vol. 117; no. 10; pp. 729 - 735
• Main Authors: Minin, O. V., Zhou, S., Baranov, P. F., Minin, I. V.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-05-2023; Springer Nature B.V
• Subjects: Acoustic waves; Atomic; Biological and Medical Physics; Biophysics; Lenses; Molecular; Optical and Plasma Physics; Optics and Laser Physics; Particle and Nuclear Physics; Physics; Physics and Astronomy; Quantum Information Technology; Solid State Physics; Spintronics; Wave diffraction
• ISSN: 0021-3640; 1090-6487
• DOI: 10.1134/S0021364023601045

Anisotropic focusing by a mesoscopic (Mie size parameter of about 18) acoustic cubic lens based on V-shaped plate structures has been simulated numerically and confirmed experimentally. It has been shown for the first time that this lens with an edge dimension of about three wavelengths ensures the focusing of an acoustic wave in air into a diffraction-limited region. In the inverse geometry of the structure, the lens completely reflects the incident acoustic wave.