Ultra-High and Near-Zero Refractive Indices of Magnetron Sputtered Thin-Film Metamaterials Based on TixOy

Vukoman Jokanović, Božana Čolović, Miloš Nenadović, Anka Trajkovska Petkoska, Miodrag Mitrić, Bojan Jokanović, Ilija Nasov
2016 Advances in Materials Science and Engineering  
Metamaterials based onTixOywith ultra-high and near-zero refractive indices were obtained by DC magnetron sputtering. The data on refractive indices, extinction coefficients, film thickness, and band gaps, obtained by spectroscopic ellipsometry, showed very high potential of these materials as metamaterials. Phase analysis performed by XRD revealed the presence of titanium phases with lower titanium oxidation states resulting from high concentration of oxygen vacancies, which are crucial for
more » ... are crucial for such extraordinary jumps and drops of refractive indices. Numerous band gaps for direct and indirect electron transitions additionally confirmed unique properties of these materials.
doi:10.1155/2016/4565493 fatcat:qj6qkltnmvhwjfcfnrqu6htrhq