Work

Extraction of the direct scattering of a sphere in a vortex beam: Theory and experiment

Year: 2026

Type: article

Abstract: The suppression of direct forward scattering is challenging for object detection in the underwater environment under the incidence of quasi-planar waves. In this work, we study the lateral spatial phase of forward acoustic scattering in a vortex beam from a sphere. By subtracting a stable incident contribution, the forward scattering is extracted from the total field with good agreement between our experimental measurements and numerical simulations. A cross correlation method of the spatial phase is proposed, and results show a linear dependence of the phase singularity shift versus the sphere's offset to the beam axis, which may be potential for the underwater target detection and positioning by using the spatial phase information as the degree of freedom. © 2026 Acoustical Society of America.

Source: JASA Express Letters

DOI: 10.1121/10.0043233

Authors: Liwei Chen, Jun Fan, Zhixiong Gong

Institutions: Shanghai Jiao Tong University, State Key Laboratory of Ocean Engineering

Language: English

Topic: Underwater Acoustics Research

Subfield: Oceanography

Field: Earth and Planetary Sciences

Domain: Physical Sciences

Open Access status: diamond

Funder: National Natural Science Foundation of China

Awards: G2266345837, G2356506499