中国物理B ›› 2019, Vol. 28 ›› Issue (11): 117801-117801.doi: 10.1088/1674-1056/ab457a
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
Chun Guo(郭春), Bin-Cheng Li(李斌成), Ming-Dong Kong(孔明东), Da-Wei Lin(林大伟)
Chun Guo(郭春)1,2, Bin-Cheng Li(李斌成)3, Ming-Dong Kong(孔明东)1,4, Da-Wei Lin(林大伟)1
摘要: Both long-term environmental durability and high reflectance of protected-Al mirrors are of great importance for developing the optical instruments in the vacuum ultraviolet (VUV) applications. In this paper, the dependence of spectral property and environmental durability of MgF2 over-coated Al mirrors using a 3-step method on deposition temperature of the outermost MgF2 layer are investigated in detail. Optics (reflectance), structure (surface morphology and crystalline), and environmental durability (humidity test) are characterized and discussed. The results show that both optical and moisture-resistant properties of MgF2 over-coated Al mirrors are dependent on MgF2 deposition temperature, and the optimal deposition temperature for the outermost MgF2 layer should be between 250℃ and 300℃ for MgF2 over-coated Al mirrors to have both reasonably high reflectance in the VUV spectral range and high moisture resistance for long lifetime applications.
中图分类号: (Optical properties of bulk materials and thin films)