THz Time-Domain Ellipsometer for Material Characterization and Paint Quality Control with More Than 5 THz Bandwidth

dc.contributor.authorKetelsen, Helge
dc.contributor.authorMästle, Rüdiger
dc.contributor.authorLiebermeister, Lars
dc.contributor.authorKohlhaas, Robert
dc.contributor.authorGlobisch, Björn
dc.date.accessioned2022-05-10T13:26:13Z
dc.date.available2022-05-10T13:26:13Z
dc.date.issued2022-04-08
dc.date.updated2022-05-05T13:25:01Z
dc.description.abstractQuality control of car body paint in the automotive industry is a promising industrial application of terahertz technology. Terahertz time-domain spectroscopy in reflection geometry enables accurate, fast, and nondestructive measurement of individual layer thicknesses of multi-layer coatings. For high precision thickness measurements, the frequency dependent complex refractive index of all layers must be calibrated very accurately. THz time-domain ellipsometry is self-referencing and provides reliable, frequency resolved material properties with high signal-to-noise ratio. The method is characterized by a high sensitivity to optical material properties and layer thicknesses. We present characterization results in the frequency range 0.1–6 THz for typical automotive paints and different substrates such as polypropylene (PP), which features a high material anisotropy. We demonstrate that the broadband material properties derived from ellipsometry allow for inline thickness measurements of multi-layer car body paints with high accuracy.en
dc.identifier.eissn2076-3417
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/16859
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-15637
dc.language.isoenen
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subject.ddc530 Physikde
dc.subject.otherellipsometryen
dc.subject.otherTHz time-domain spectroscopyen
dc.subject.othermaterial characterizationen
dc.subject.otherthin film measurementen
dc.subject.otherautomotive paintsen
dc.subject.otherquality controlen
dc.subject.othercalibrationen
dc.titleTHz Time-Domain Ellipsometer for Material Characterization and Paint Quality Control with More Than 5 THz Bandwidthen
dc.typeArticleen
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.articlenumber3744en
dcterms.bibliographicCitation.doi10.3390/app12083744en
dcterms.bibliographicCitation.issue8en
dcterms.bibliographicCitation.journaltitleApplied Sciencesen
dcterms.bibliographicCitation.originalpublishernameMDPIen
dcterms.bibliographicCitation.originalpublisherplaceBaselen
dcterms.bibliographicCitation.volume12en
tub.accessrights.dnbfreeen
tub.affiliationFak. 2 Mathematik und Naturwissenschaften::Inst. Optik und Atomare Physik::FG Terahertztechnologiede
tub.affiliation.facultyFak. 2 Mathematik und Naturwissenschaftende
tub.affiliation.groupFG Terahertztechnologiede
tub.affiliation.instituteInst. Optik und Atomare Physikde
tub.publisher.universityorinstitutionTechnische Universität Berlinen

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