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[IEEE 2018 International Conference Laser Optics (ICLO) - Saint Petersburg, Russia (2018.6.4-2018.6.8)] 2018 International Conference Laser Optics (ICLO) - Anisotropic optical interference coatings for polarization control in high-power lasers
摘要： Optical anisotropy played a crucial role in development of advanced optical systems. In this study, a novel multi-layer approach of high band-gap birefringent coatings was proposed and investigated. Zero-order thin film retarders and normal incidence polarizers based on all-silica nanostructures are fabricated by oblique angle deposition process. Low optical losses and the potential to withstand high laser fluence in nanosecond regime at 355 nm wavelength for both elements were demonstrated.
关键词： waveplates,polarizers,nanostructured coatings,high-power lasers
更新于2025-09-09 09:28:46
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Hollow Plasma-Sprayed Spherical Nanostructured Titania Feedstock for Photocatalytic Applications
摘要： There have been persistent challenges in thermal spraying of nanoparticles feedstock for making nanostructured coatings with desired mechanical strength. Here we report fabrication of nanostructured titania coatings by atmospheric plasma spraying of hollow titania spheres, and microstructures and photocatalytic activities of the coatings are examined. The hollow microspheres are * 50 lm in diameter and possess a mesoporous shell of 1-3 lm in thickness. The coatings show micro-nano hybrid structures with well-retained titania nanoparticles and agglomerated granules. High anatase content is achieved in the coatings, suggesting that constrained heating of the particles effectively prevents the transformation from anatase to rutile. The spherical characteristics of the organic materials in the feedstock powder play dominant roles in regulating the physicochemical characteristics of the coatings for photocatalytic performances. These results would provide insight into large-scale thermal spray fabrication of nanostructured coatings using appropriately designed hollow spherical powder.
关键词： nanostructured coatings,plasma spray,titania nanoparticles,photocatalytic performances,hollow microspheres
更新于2025-09-09 09:28:46