کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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848889 | 909253 | 2014 | 4 صفحه PDF | دانلود رایگان |
High-dielectric constant multilayer coatings are commonly used on optics to increase the laser damage resistance of optics. In this work, the three-dimensional finite-difference time-domain is improved to simulate the electric field intensity distribution in the silica–hafnia multilayer coatings on fused silica subsurface with lateral crack. Results reveal that as the substrate is defect-free, the largest intensification is at the surface layer, especially in the hafnia layer. As the lateral crack appears on the subsurface of fused silica, the intensified sites are mainly located at distorted coatings layers. Dependences of peak LIEF on crack's parameters are detailed investigated. Results show that laser intensification is more sensitive to its width, and the modulation of lateral defect with silica–hafnia multilayer is greater than nodular defect as its width larger than 5λ.
Journal: Optik - International Journal for Light and Electron Optics - Volume 125, Issue 16, August 2014, Pages 4398–4401