A superlattice comprising alternating layers of negative-refractive-index photonic crystals and positive-refractive-index dielectric media has been shown to exhibit an effective refractive index of ...

PARIS — A new formula based on precise measurements of the eye allows IOL power calculation without a surgeon “fudge factor,” according to presenters here. The formula is accurate even for eyes that ...

Researchers in Korea have created a new metamaterial with the most extreme positive index of refraction yet – a whopping 38.6. The metamaterial operates at terahertz frequencies and the team believes ...