Surface Protection and Activation of Mid-IR Plasmonic Waveguides for Spectroscopy of Liquids

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dc.contributor.authorDavid, Maurocs
dc.contributor.authorDoganlar, Ismael C.cs
dc.contributor.authorNazzari, Danielecs
dc.contributor.authorArigliani, Elenacs
dc.contributor.authorWacht, Dominikcs
dc.contributor.authorSistani, Masiarcs
dc.contributor.authorDetz, Hermanncs
dc.contributor.authorRamer, Georgcs
dc.contributor.authorLendl, Bernhardcs
dc.contributor.authorWeber, Walter M.cs
dc.contributor.authorStrasser, Gottfriedcs
dc.contributor.authorHinkov, Borislavcs
dc.coverage.issue2cs
dc.coverage.volume42cs
dc.date.issued2024-01-15cs
dc.description.abstractLiquid spectroscopy in the mid-infrared spectral range is a very powerful, yet premature technique for selective and sensitive molecule detection. Due to the lack of suitable concepts and materials for versatile miniaturized sensors, it is often still limited to bulky systems and offline analytics. Mid-infrared plasmonics is a promising field of current research for such compact and surface-sensitive structures, enabling new pathways for much-needed photonic integrated sensors. In this work, we focus on extending the concept of Ge/Au-based mid-infrared plasmonic waveguides to enable broadband liquid detection. Through the implementation of high-quality dielectric passivation layers deposited by atomic layer deposition (ALD), we cover the weak and water-soluble Ge native oxide. We show that approximately 10 nm of e.g. Al2O3 or ZrO2 can already protect the plasmonic waveguides for up to 90 min of direct water exposure. This unlocks integrated sensing schemes for broadband molecule detection based on mid-infrared plasmonics. In a proof-of-concept experiment, we further demonstrate that the ZrO(2 )coated waveguides can be activated by surface functionalization, allowing the direct measurement of diethyl ether at a wavelength of 9.38 mu m.en
dc.formattextcs
dc.format.extent748-759cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationJOURNAL OF LIGHTWAVE TECHNOLOGY. 2024, vol. 42, issue 2, p. 748-759.en
dc.identifier.doi10.1109/JLT.2023.3321034cs
dc.identifier.issn1558-2213cs
dc.identifier.orcid0000-0002-4167-3653cs
dc.identifier.other188947cs
dc.identifier.urihttp://hdl.handle.net/11012/249397
dc.language.isoencs
dc.publisherIEEEcs
dc.relation.ispartofJOURNAL OF LIGHTWAVE TECHNOLOGYcs
dc.relation.urihttps://ieeexplore.ieee.org/document/10268011cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/1558-2213/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectPlasmonsen
dc.subjectSurface wavesen
dc.subjectOptical waveguidesen
dc.subjectGermaniumen
dc.subjectDielectricsen
dc.subjectSensorsen
dc.subjectQuantum cascade lasersen
dc.subjectliquid spectroscopyen
dc.subjectmid-infrared plasmonicsen
dc.subjectphotonic integrated circuitsen
dc.subjectsurface functionalizationen
dc.subjectwaveguide passivationen
dc.titleSurface Protection and Activation of Mid-IR Plasmonic Waveguides for Spectroscopy of Liquidsen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-188947en
sync.item.dbtypeVAVen
sync.item.insts2025.02.03 15:50:40en
sync.item.modts2025.01.17 16:50:04en
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Epitaxní materiály a nanostrukturycs
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Epitaxní materiály a nanostruktury