کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1664546 | 1008760 | 2015 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
HfO2/SiO2 multilayer enhanced aluminum alloy-based dual-wavelength high reflective optics
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Laser durable multiband high reflective optics can be attained by depositing HfO2/SiO2 stacks on diamond-turned and optically polished aluminum alloy substrates. HfO2 and SiO2 single layers were prepared using modified plasma-ion assisted deposition. Ellipsometric measurements were performed using two types of variable angle spectroscopic ellipsometry with a combined spectral range of 150 nm to 14 μm. Optical constants were generated in the entire spectral range. Scatter loss as a function of surface roughness was calculated at 1064 nm, 1572 nm, and 4.1 μm, representing a primary wavelength, a secondary wavelength, and a middle wave infrared band selected for a dual-wavelength laser beam expander, respectively. The surface requirement of the aluminum alloy substrates was determined. Calculated and measured spectral reflectances were compared. Laser-induced damage threshold tests were performed at 1064 nm, 20 ns, and 20 Hz. A laser-induced damage threshold of 47 J/cm2 was determined. Post-damage analysis suggests that nodule defects are the limiting factor for the laser-induced damage threshold. Surface modification of the aluminum alloy was identified as a potential technical solution that may further increase the laser damage resistance of the dielectric enhanced dual-wavelength reflective optics.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thin Solid Films - Volume 592, Part B, 1 October 2015, Pages 232-236
Journal: Thin Solid Films - Volume 592, Part B, 1 October 2015, Pages 232-236
نویسندگان
Angela Q. Wang, Jue Wang, Michael J. D'lallo, Jim E. Platten, Joseph C. Crifasi, Brian P. Roy,