Fabrication of silver helix microstructures in a large area by a two-photon absorption DLW method

Abstract Large-area helix microstructures intended for metamaterials were fabricated using a negative photoresist, SU-8 using a two photon absorption direct laser writing (TPA-DLW). Two types of helix structures were fabricated. One type is those with no neighboring distance. In this case, compact h...

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Autores principales:	Naoto Tsutsumi, Yusaku Takai, Kenji Kinashi, Wataru Sakai
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/bd9dc04273b143a48e8225eabaa94c30
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spelling	oai:doaj.org-article:bd9dc04273b143a48e8225eabaa94c302021-12-02T17:06:09ZFabrication of silver helix microstructures in a large area by a two-photon absorption DLW method10.1038/s41598-021-95457-x2045-2322https://doaj.org/article/bd9dc04273b143a48e8225eabaa94c302021-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-95457-xhttps://doaj.org/toc/2045-2322Abstract Large-area helix microstructures intended for metamaterials were fabricated using a negative photoresist, SU-8 using a two photon absorption direct laser writing (TPA-DLW). Two types of helix structures were fabricated. One type is those with no neighboring distance. In this case, compact helix structures with radius of 2.5 and 1.0 μm were fabricated. Another type is those with enough neighboring distance. The helix structures with shorter neighboring distance below 6.0 μm were collapsed, whereas those with longer neighboring distance more than 6.5 μm, free-standing helix structures could successfully be built. To stabilize the fabricated free-standing helix microstructures with a 1 μm radius, circular foundations with a radius of 1.3 μm and elevation angle of 10, 12, or 14° were built in advance. The foundation is useful to avoid collapsing the helix microstructures. Due to the useful foundation, over 18,000 helical structures were fabricated in a large area. The fabricated helical structures were coated with silver using an electroless plating method to produce 3D metallic helix structures. Silver coating was measured using a EDX measurement. The obtained helical structures have the potential for metamaterials to control the handedness of a circularly polarized infrared beam.Naoto TsutsumiYusaku TakaiKenji KinashiWataru SakaiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Naoto Tsutsumi Yusaku Takai Kenji Kinashi Wataru Sakai Fabrication of silver helix microstructures in a large area by a two-photon absorption DLW method
description	Abstract Large-area helix microstructures intended for metamaterials were fabricated using a negative photoresist, SU-8 using a two photon absorption direct laser writing (TPA-DLW). Two types of helix structures were fabricated. One type is those with no neighboring distance. In this case, compact helix structures with radius of 2.5 and 1.0 μm were fabricated. Another type is those with enough neighboring distance. The helix structures with shorter neighboring distance below 6.0 μm were collapsed, whereas those with longer neighboring distance more than 6.5 μm, free-standing helix structures could successfully be built. To stabilize the fabricated free-standing helix microstructures with a 1 μm radius, circular foundations with a radius of 1.3 μm and elevation angle of 10, 12, or 14° were built in advance. The foundation is useful to avoid collapsing the helix microstructures. Due to the useful foundation, over 18,000 helical structures were fabricated in a large area. The fabricated helical structures were coated with silver using an electroless plating method to produce 3D metallic helix structures. Silver coating was measured using a EDX measurement. The obtained helical structures have the potential for metamaterials to control the handedness of a circularly polarized infrared beam.
format	article
author	Naoto Tsutsumi Yusaku Takai Kenji Kinashi Wataru Sakai
author_facet	Naoto Tsutsumi Yusaku Takai Kenji Kinashi Wataru Sakai
author_sort	Naoto Tsutsumi
title	Fabrication of silver helix microstructures in a large area by a two-photon absorption DLW method
title_short	Fabrication of silver helix microstructures in a large area by a two-photon absorption DLW method
title_full	Fabrication of silver helix microstructures in a large area by a two-photon absorption DLW method
title_fullStr	Fabrication of silver helix microstructures in a large area by a two-photon absorption DLW method
title_full_unstemmed	Fabrication of silver helix microstructures in a large area by a two-photon absorption DLW method
title_sort	fabrication of silver helix microstructures in a large area by a two-photon absorption dlw method
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/bd9dc04273b143a48e8225eabaa94c30
work_keys_str_mv	AT naototsutsumi fabricationofsilverhelixmicrostructuresinalargeareabyatwophotonabsorptiondlwmethod AT yusakutakai fabricationofsilverhelixmicrostructuresinalargeareabyatwophotonabsorptiondlwmethod AT kenjikinashi fabricationofsilverhelixmicrostructuresinalargeareabyatwophotonabsorptiondlwmethod AT watarusakai fabricationofsilverhelixmicrostructuresinalargeareabyatwophotonabsorptiondlwmethod
_version_	1718381753959186432

Fabrication of silver helix microstructures in a large area by a two-photon absorption DLW method

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