Optical and Structural Properties of Nanostructured Oxide Thin Films by Sol‐Gel Technique

$TiO2$ and $Al2O3$ are commonly used materials in optical thin films in the visible and near‐infrared wavelength region due to their high transparency and good stability. In this work, $TiO2$ and $Al2O3$ single, and nano composite thin films with different compositions were deposited on glass and silicon substrates at room temperature using a sol‐gel spin coater. The optical properties like reflectance, transmittance and refractive index have been studied using Spectrophotometer, and structural properties using X‐Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM).