Team develops a powerful Bragg reflector with ultrahigh refractive index metamaterial

https://phys.org/news/2022-09-team-powerful-bragg-reflector-ultrahigh.html

"metamaterial that is uniformly arranged with the 1-nanometer-level gaps by assembling spherical gold nanoparticles. This material, which maximizes light-matter interaction, recorded the highest refractive index in the visible and near-infrared regions. The 2D superstructures exhibited the highest-ever refractive index of 7.8. The distributed Bragg reflector (DBR), which is made by stacking these metamaterials and polymer layers with a low refractive index, strongly reflected specific wavelengths"

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