- A team of physicists at ETH Zurich has created a tiny metalens that can half the wavelength of incident light.
- They have achieved this using a special metal-oxide lens material called lithium niobate and through nanoscale pattern, stamped into the material.
- Such metalenses could be used as a security feature on banknotes or in the fabrication of ultra-thin elements for cameras.
Ultra-thin lenses that make infrared light visible
Submitted 1 week ago by Pro@programming.dev to science@mander.xyz
photonic_sorcerer@lemmy.dbzer0.com 1 week ago
Pretty sweet stuff - they combined metalens tech (lens miniaturization) with a nonlinear optical material (Lithium niobate). The physics of harmonic generation is amazing by itself: light entering such a crystal induces photons of a smaller wavelength to be emitted.