| Autor: |
Chandran, Loheshwaran, Syed Akbar Ali, Mohamed Subair, Bobbs, Bradley, Dutta, Chandan, JD, Joseph, Bhattacharya, Enakshi, Rajagopal, Prabhu |
| Zdroj: |
Scientific Reports; 12/19/2024, Vol. 14 Issue 1, p1-20, 20p |
| Abstrakt: |
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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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