Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5348963 | Applied Surface Science | 2015 | 24 Pages |
Abstract
Antireflective coatings with adjustable transmittance and high laser-induced damage threshold (LIDT) have been prepared by the deposition of magnesium fluoride (MgF2) nanoparticles on fused silica substrates. The peak transmittance of the coatings is 99.98%, mainly due to the low refractive index caused by the introduction of porosity between MgF2 nanoparticles. With varying the coating thickness, the optimized antireflective performance of the coatings at any wavelength between 300 and 1100Â nm can be achieved. The effect of the particle size on the antireflective properties of the coatings has been also investigated. The coatings prepared from small particles exhibit higher transmittance at short wavelengths than do the coatings prepared from large particles. The LIDTs of the coatings at 351Â nm, 527Â nm and 1053Â nm are 25Â J/cm2, 34Â J/cm2 and 63Â J/cm2, respectively. The high LIDT of the coatings can be mainly attributed to the large band gap of MgF2. The antireflective coatings may be potentially applied in the high-powered lasers.
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Authors
Fangting Chi, Guilin Wei, Qian Zhang, Xinyu Sun, Lingjie Zhang, Xirui Lu, Lielin Wang, Facheng Yi, Xiaoling Gao,