Nanostructured Multilayer Coatings for Spatial Filtering

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dc.contributor.author Turduev, Mirbek
dc.contributor.author Grineviciute, Lina
dc.contributor.author Babayiğit, Ceren
dc.contributor.author Gailevicius, Darius
dc.contributor.author Peckus, Martynas
dc.contributor.author Tolenis, Tomas
dc.contributor.author Vengris, Mikas
dc.contributor.author Kurt, Hamza
dc.contributor.author Staliunas, Kestutis
dc.date.accessioned 2021-04-15T08:43:07Z
dc.date.available 2021-04-15T08:43:07Z
dc.date.issued 2021-03
dc.identifier.issn 2195-1071
dc.identifier.uri https://doi.org/10.1002/adom.202001730
dc.identifier.uri http://hdl.handle.net/20.500.12485/758
dc.description.abstract Spatial filtering is an important mechanism to improve the spatial quality of laser beams. Typically, a confocal arrangement of lenses with a diaphragm in the focal plane is used for intracavity spatial filtering. Such conventional filtering requires access to the far-field domain. In microlasers, however, conventional filtering is impossible due to the lack of space in microresonators to access the far-field. Therefore, a novel concept for more compact and efficient spatial filtering is necessary. In this study, a conceptually novel mechanism of spatial filtering in the near-field domain is proposed and demonstrated, by a nanostructured multilayer coating-a 2D photonic crystal structure with a periodic index modulation along the longitudinal and transverse directions to the beam propagation. The structure is built on a nanomodulated substrate, to provide the transverse periodicity. The physical vapor deposition is used to provide self-repeating modulation in the longitudinal direction. A 5 mu m thick photonic multilayer structure composed of nanostructured multiple layers of alternating high- and low-index materials providing spatial filtering in the near-infrared frequencies with 2 degrees low angle passband is experimentally demonstrated. The proposed photonic structure can be considered as an ideal component for intracavity spatial filtering in microlasers. en_US
dc.language.iso en en_US
dc.subject Materials Science, Multidisciplinary en_US
dc.subject Optics en_US
dc.title Nanostructured Multilayer Coatings for Spatial Filtering en_US
dc.type Article en_US
dc.relation.journal Advenced optical material en_US
dc.identifier.startpage 1 en_US
dc.identifier.endpage 7 en_US

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