Work

Converging acoustic waves through complex media with a four-phase metalens

Year: 2024

Type: article

Abstract: Wavefront shaping is an established solution to converge acoustic waves through complex media. Discrete phase sampling is inevitable in practice because of manufacture resolution. Limited phase sampling undermines focusing performance, which is hardly improved by increasing the number of phase sections. We propose that such loss can be alleviated when the modulator is designed directly on discrete phases. The feedback-based wavefront shaping with the genetic algorithm has been taken here. The performance of the optimized four-phase metalens catches up with the continuous one and is robust to variations in complex media. Experiments have confirmed its function. These results have potential applications in acoustic focusing and imaging through complex media.

Source: Journal of Applied Physics

DOI: 10.1063/5.0233659

Authors: Jie Yao, Shi-Zhuo Sun, Yu-Hang Lv

Institution: Nanjing Normal University

Language: English

Topic: Acoustic Wave Phenomena Research

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,500

Funder: National Natural Science Foundation of China