A physical origin of cross-polarization and higher-order modes in two-dimensional (2D) grating couplers and the related device performance limitations

dc.contributor.authorGeorgieva, Galina
dc.contributor.authorVoigt, Karsten
dc.contributor.authorSeiler, Pascal M.
dc.contributor.authorMai, Christian
dc.contributor.authorPetermann, Klaus
dc.contributor.authorZimmermann, Lars
dc.date.accessioned2022-02-08T08:42:30Z
dc.date.available2022-02-08T08:42:30Z
dc.date.issued2021-05-26
dc.date.updated2022-02-03T01:49:09Z
dc.description.abstractWe explore scattering effects as the physical origin of cross-polarization and higher-order modes in silicon photonic 2D grating couplers (GCs). A simplified analytical model is used to illustrate that in-plane scattering always takes place, independent of grating geometry and design coupling angle. Experimental investigations show furthermore that grating design parameters are especially related to the modal composition of both the target- and the cross-polarization. Scattering effects and the associated cross-polarization and higher-order modes are indicated as the main reason for the higher 2D GC insertion loss compared to standard 1D GCs. In addition, they can be responsible for a variable 2D GC spectrum shape, bandwidth and polarization dependent loss.en
dc.description.sponsorshipBMBF, 13N14936, Verbundprojekt: Photonic Embedding of Active Region LASER Chips on Silicon (PEARLS) - Teilvorhaben: Integration von III-V Gain-Chips ins obere Backend der Si-Photonik Plattform (BiCMOS)en
dc.identifier.eissn2515-7647
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/16315
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-15090
dc.language.isoenen
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subject.ddc530 Physikde
dc.subject.othertwo-dimensional grating couplersen
dc.subject.othersilicon photonicsen
dc.subject.otherscatteringen
dc.subject.otherhigher-order modesen
dc.subject.othercross-polarizationen
dc.subject.otherpolarization splittingen
dc.titleA physical origin of cross-polarization and higher-order modes in two-dimensional (2D) grating couplers and the related device performance limitationsen
dc.typeArticleen
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.articlenumber035002en
dcterms.bibliographicCitation.doi10.1088/2515-7647/abf942en
dcterms.bibliographicCitation.issue3en
dcterms.bibliographicCitation.journaltitleJournal of Physics: Photonicsen
dcterms.bibliographicCitation.originalpublishernameIOPen
dcterms.bibliographicCitation.originalpublisherplaceBristolen
dcterms.bibliographicCitation.volume3en
tub.accessrights.dnbfreeen
tub.affiliationFak. 4 Elektrotechnik und Informatik>Inst. Hochfrequenz- und Halbleiter-Systemtechnologien>FG Hochfrequenztechnik-Photonikde
tub.affiliation.facultyFak. 4 Elektrotechnik und Informatikde
tub.affiliation.groupFG Hochfrequenztechnik-Photonikde
tub.affiliation.instituteInst. Hochfrequenz- und Halbleiter-Systemtechnologiende
tub.publisher.universityorinstitutionTechnische Universität Berlinen
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