[Polarization characteristic of Al + MgF2 film at VUV].
Polarization characteristic of Al + MgF2 is researched theoretically and experimentally. According to the theory of electromagnetism, the reflectance perpendicular and parallel to the incident plane of Al + MgF2 is calculated in the way of matrix optics. The effect of incident conditions and thickness of MgF2 is considered on the reflectance of Al + MgF2 coatings. The MgF2 not only prevents the oxidation of aluminum but also increases the reflectance of Al + MgF2 by interference. The polarization of Al + MgF2 is analyzed using the concept of ratio of extinction based on above mentioned calculations. The polarization character of Al + MgF2 and single Al coating is compared. The reflectances perpendicular and parallel to the incident plane of Al + MgF2 film are measured at VUV range, using LiF polarizer as a VUV polarizer. So the polarization character of Al + MgF2 is researched experimentally. Both theoretical and experimental results of the polarization character of Al + MgF2 are coincident.
Liu
Ying
Y
State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130022, China.
Li
Zhi-gang
ZG
Li
Fu-tian
FT
D000535:Aluminum / Q000737:chemistry*; D004574:Electromagnetic Fields; D005454:Fluorescence Polarization; D005459:Fluorides / Q000737:chemistry*; D017616:Magnesium Compounds / Q000737:chemistry*; D008962:Models, Theoretical; D055095:Optics and Photonics; D009942:Organometallic Compounds / Q000737:chemistry; D013056:Spectrophotometry, Ultraviolet / Q000379:methods*; D014618:Vacuum
D017616:Magnesium Compounds; D009942:Organometallic Compounds; C031288:magnesium fluoride; D000535:Aluminum; D005459:Fluorides