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

https://unwall.app/phys.org/news/2026-11-air-holes-silicon-w...

UV Mie-void reflective metasurfaces in silicon (2026) https://doi.org/10.1117/1.AP.9.1.016002

That is a genius idea. I assume this could be tuned for other wavelengths of light just by adjusting the size of the air holes and nanoscale structures? Could the same idea also be used for directing RF?

• ranger_danger · 2 hours ago

  Also wouldn't the holes cause a percentage of light loss?

The application to EUV/XUV is important, as those wavelengths can be very useful for photolithography.