We designed a distributed Bragg reflector (DBR) based on amorphous oxides with a high refractive index contrast ( \(\varvec{\Delta n \sim 0.78}\) ) with strong reflectance properties. The configurations achieved reflectance of \(\varvec{\sim 99\%}\) and the stopband width of \(\varvec{\sim 32-35\% }\) at \(\varvec{R >50\%}\) . The optical behavior is quite sensitive to the surrounding refractive index which allowed for spectral tuning. Among the tested designs, the C3 configuration demonstrated the highest shift 100 nm/RIU in ethanol and 66 nm/ RIU in water. These shifts caused by interference effects and field enhancement inside the multilayer periodic dielectric systems directly induced by changes in the surrounding refractive index. CIE 1931 mapping used to track optical shifts revealing how periodicity governs optical output; which clearly showed how the structure affects the optical output. The solution processed DBR can be a strong candidate for compact photonic applications like optical filters or sensing devices.
