Aluminum coating: high UV reflectivity

Introduction: In the fields of science and industry,aluminizerWidely used in various fields, such as solar panels, mirrors, semiconductor devices, etc. This article will explore the characteristics and applications of aluminum coating, as well as how to optimize its reflectivity in the vacuum ultraviolet region (VUV) through fluoride protection layer.

1、 The UV Reflection Characteristics of Aluminum

Aluminum is an important metallic material with excellent optical properties. In the ultraviolet region, aluminum exhibits extremely high reflectivity, making it one of the ideal reflective materials. According to research, the reflectivity of aluminum can reach over 90% in ultraviolet light ranging from 200 to 400nm, especially in the visible and near ultraviolet light bands.

2、 Application of Aluminum Film in VUV Field

In optical applications in the vacuum ultraviolet region (VUV),Aluminum filmPlays an important role. VUV spectroscopy is widely used in fields such as photoelectron microscopy, terahertz optics, and photon energetics. Through appropriate processes and substrate treatment, we can prepare aluminum films with high reflectivity and low scattering rate, thereby achieving high-quality VUV optical devices.

3、 Optimization of fluoride protective layer

Although aluminum has excellent ultraviolet reflection properties, its reflection characteristics decrease around 850nm, mainly due to the influence of phonon absorption. In order to optimize the reflectivity of aluminum film in the VUV field, researchers have introduced the concept of fluoride protective layer.

The fluoride protective layer can not only improve the corrosion resistance of the aluminum film, but also reduce phonon absorption, thereby increasing the reflectivity of the aluminum film in the VUV region. Some commonly used fluoride protective layer materials include lithium fluoride, magnesium fluoride, etc. These materials have high refractive index and low scattering index characteristics, which can provide better protection and performance optimization for aluminum films.

However, the preparation of fluoride protective layer is not easy and requires precise control of process conditions and material purity. Therefore, researchers have been exploring new materials and technologies to achieve better fluoride protective layer effects.

Summary:Aluminum coatingIt exhibits excellent performance in ultraviolet reflection and has broad application prospects in the field of VUV. By introducing a fluoride protective layer, we can further optimize the performance of the aluminum film and improve its reflectivity in the VUV region. With the continuous advancement of technology and in-depth research on material properties, the application prospects of aluminum coating in the optical field will be even broader.