Laser-induced pit formation in UV-Antireflective coatings

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dc.identifier.uri Paschel, S. Balasa, I. Jensen, L.O. Cheng, X. Wang, Z. Ristau, D. 2020-12-08T15:27:05Z 2020-12-08T15:27:05Z 2018
dc.identifier.citation Paschel, S.; Balasa, I.; Jensen, L.O.; Cheng, X.; Wang, Z.; Ristau, D.: Laser-induced pit formation in UV-Antireflective coatings. In: Proceedings of SPIE 10805 (2018), 108051N. DOI:
dc.description.abstract Previous studies have shown that nanometer scale defects can lead to the formation of submicrometer craters, if located in coatings with a relatively small thickness. Due to the small size, such damages are challenging to detect in the online and offline damage detection and may therefore lead to an overestimation of the LIDT for the tested optical component. However, the influence of these nanopits on the optical properties and the impact on the initiation of catastrophic damage was not investigated in detail in the past. In order to study the correlation between nanopits, optical properties and catastrophic damage, samples with an AR-coating were fabricated by means of ion beam sputtering (IBS) and tested for their laser resistance by LIDT raster scans in the nanosecond regime at 355 nm. The generation and morphology changes of the nanopits were monitored for different pulse numbers and in dependence of the starting fluence. In addition to the inspection with an optical microscope in differential interference contrast (DIC) mode as prescribed by ISO 21254, alternative inspection methods, for example, dark field microscopy and scanning electron microscopy (SEM), were used to detect the nanopits. The damage test revealed that nanopits occur rarely in standard AR-coatings and possess only a small relevance for the LIDT. The typical damage morphology observed consisted of micrometer-sized pits which exhibited a stable size over a large fluence range and no growth after repeated irradiation. © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only. eng
dc.language.iso eng
dc.publisher Bellingham : SPIE
dc.relation.ispartofseries Proceedings of SPIE 10805 (2018)
dc.rights Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden. Dieser Beitrag ist aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich.
dc.subject Catastrophic damage eng
dc.subject Defect-induced laser damage eng
dc.subject Nanosecond time scale eng
dc.subject Pit formation eng
dc.subject.ddc 620 | Ingenieurwissenschaften und Maschinenbau ger
dc.title Laser-induced pit formation in UV-Antireflective coatings eng
dc.type conferenceObject
dc.type article
dc.type Text
dc.bibliographicCitation.volume 10805
dc.bibliographicCitation.firstPage 108051N
dc.description.version publishedVersion
tib.accessRights frei zug�nglich

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