Reconfigurable chalcogenide metacoatings

Here, we show that the precise, non-resonant, subwavelength, dispersion engineering of oxide and phase change chalcogenide glasses, through lithography-free, bottom-up growth techniques, paves the way to the realization of alloys with tunable optical and electronic properties. We show that tunability may be achieved on a material level without the need for stoichiometric changes to chemical composition through oblique angle vapour deposition and oxidation techniques. We also go on to show how metacoatings realized through interlayer nanostructuring can be utilized to realize ultra-compact photonic modulators for emerging integrated computing and telecommunication applications relying on silicon photonics platforms.