O. V. Minin, S. Zhou, P. F. Baranov, I. V. Minin, “Diffraction-limited focusing of acoustic waves by a mesoscopic flat Janus Lens”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2023, Volume 117, Issue 10,Pages <nobr>727–733</nobr>

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Pis'ma v Zh. Èksper. Teoret. Fiz., 2023 Volume 117, Issue 10, Pages 727–733 (Mi jetpl6941)

OPTICS AND NUCLEAR PHYSICS

Diffraction-limited focusing of acoustic waves by a mesoscopic flat Janus Lens

O. V. Minin^ab, S. Zhou^c, P. F. Baranov^a, I. V. Minin^adb

^a National Research Tomsk Polytechnic University, Tomsk, 634050 Russia
^b Siberian State University of Geosystems and Technologies, Novosibirsk, 630010 Russia
^c Jiangsu Key Laboratory of Advanced Manufacturing Technology, Faculty of Mechanical and Material Engineering, Huaiyin Institute of Technology, 223003 Huai’an, People’s Republic of China
^d Design and Technology Institute of Applied Microelectronics, Rzhanov Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia

Abstract: 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.

Received: 09.03.2023
Revised: 02.04.2023
Accepted: 06.04.2023

DOI: 10.31857/S1234567823100038

English version: Journal of Experimental and Theoretical Physics Letters, 2023, 117:10, 729–735

© Steklov Math. Inst. of RAS, 2024