Work

Micron-scale imaging using bulk ultrasonics

Year: 2024

Type: article

Abstract: An extraordinary resolution down to 50 microns is demonstrated for the first time for bulk ultrasonics, using novel micro-fabricated metamaterial lenses. The development and performance of the silicon-based Fabry-Perot type metalenses with an array of 10 micrometre square holes are discussed. Challenges in wave reception are addressed by a custom-developed micro-focal laser with a sub-micron spot size and an innovative experimental set-up together with physics based signal processing. The results provide a pathway for material diagnostics at greater depths with high resolution using micro-metalens-enhanced ultrasound as an alternative to expensive and radiation prone electromagnetic techniques.

Source: Scientific Reports

DOI: 10.1038/s41598-024-72634-2

Authors: Loheshwaran Chandran, Mohamed Subair Syed Akbar Ali, Bradley Bobbs, Chandan Dutta, Joseph JD, Enakshi Bhattacharya, Prabhu Rajagopal

Institutions: Indian Institute of Technology Madras, Intelligent Optical Systems (United States)

Language: English

Topic: Ultrasonics and Acoustic Wave Propagation

Subfield: Mechanics of Materials

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,590

OpenAlex ID: W4403514353

FWCI: 0.906

Cites: 43

Cited by: 6

Related to: 10