# Air holes turn silicon wafers into flat ultraviolet focusing mirrors for compact optics

- Source: Phys.org - latest science and technology news stories
- Published: 2026-11-06T22:00:01+00:00
- Category: Science
- Original: https://phys.org/news/2026-11-air-holes-silicon-wafers-flat.html
- Canonical: https://groundlevelnews.com/story/air-holes-turn-silicon-wafers-into-flat-ultraviolet-focusing-mirrors-f-f92c7e/

Traditional lenses and mirrors focus light using curved surfaces. Metasurfaces can achieve similar functions with a flat layer of nanoscale structures that locally control the phase of light. Extending these flat optics into the ultraviolet could support compact systems for high-resolution imaging, spectroscopy, and sensing, but it introduces a fundamental materials problem: many of the materials

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