Optical constants of Al2O3 (Aluminium sesquioxide, Sapphire, Alumina)
Kischkat et al. 2012: Thin film; n,k 1.54–14.3 µm
Complex refractive index (n+ik)
Derived optical constants
497-nm single layer on Si substrate. Prepared by room temperature reactive sputter deposition using Al target and 2.0 SCCM O2 flux.
Data on the influence of deposition conditions on the optical properties of the film can be found in the original publication.
Data on the refractive index (n) in the visible can be found in the original publication.
J. Kischkat, S. Peters, B. Gruska, M. Semtsiv, M. Chashnikova, M. Klinkmüller, O. Fedosenko, S. Machulik, A. Aleksandrova, G. Monastyrskyi, Y. Flores, and W. T. Masselink. Mid-infrared optical properties of thin films of aluminum oxide, titanium dioxide, silicon dioxide, aluminum nitride, and silicon nitride, Appl. Opt. 51, 6789-6798 (2012) (Numerical data kindly provided by Jan Kischkat)
Aluminium sesquioxide, Al2O3Al2O3, commonly known as alumina or aluminum oxide, is a ceramic material that has a wide range of applications due to its excellent mechanical and optical properties. This compound crystallizes in various phases, the most stable and common of which is the corundum structure. Alumina is transparent in the ultraviolet to the infrared range, making it a versatile material for a variety of optical applications such as protective windows and lenses. It has a high refractive index and is also known for its strong dielectric properties. One of the key attributes of Al2O3 is its remarkable thermal stability and resistance to chemical attack, which makes it suitable for harsh environment applications. Furthermore, the material has been investigated for its nonlinear optical characteristics, although it is generally less efficient in this regard compared to other nonlinear optical materials. Alumina can also serve as a substrate material for thin-film optical coatings. In summary, Al2O3 is a robust and multifunctional material that is extensively studied for its enduring relevance in both traditional and advanced optical systems.
- Aluminium oxide
- Aluminium oxide (α)
- Aluminium(III) oxide
- Dialuminium trioxide