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Grating Coupler Design for Low-Cost Fabrication in Amorphous Silicon Photonic Integrated Circuits

2024-09Artigo científico Acesso aberto
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dc.contributor.authorAlmeida, Daniel
dc.contributor.authorLourenço, Paulo
dc.contributor.authorFantoni, Alessandro
dc.contributor.authorCosta, João
dc.contributor.authorVieira, Manuela
dc.contributor.institutionCTS - Centro de Tecnologia e Sistemas
dc.contributor.institutionUNINOVA-Instituto de Desenvolvimento de Novas Tecnologias
dc.contributor.institutionFaculdade de Ciências e Tecnologia (FCT)
dc.contributor.pblMDPI - Multidisciplinary Digital Publishing Institute
dc.date.accessioned2025-03-07T22:27:15Z
dc.date.available2025-03-07T22:27:15Z
dc.date.issued2024-09
dc.descriptiongrant SFRH/BD/07792/2021. Publisher Copyright: © 2024 by the authors.
dc.description.abstractPhotonic circuits find applications in biomedicine, manufacturing, quantum computing and communications. Photonic waveguides are crucial components, typically having cross-section orders of magnitude inferior when compared with other photonic components (e.g., optical fibers, light sources and photodetectors). Several light-coupling methods exist, consisting of either on-plane (e.g., adiabatic and end-fire coupling) or off-plane methods (e.g., grating and vertical couplers). The grating coupler is a versatile light-transference technique which can be tested at wafer level, not requiring specific fiber terminations or additional optical components, like lenses, polarizers or prisms. This study focuses on fully-etched grating couplers without a bottom reflector, made from hydrogenated amorphous silicon (a-Si:H), deposited over a silica substrate. Different coupler designs were tested, and of these we highlight two: the superimposition of two lithographic masks with different periods and an offset between them to create a random distribution and a technique based on the quadratic refractive-index variation along the device’s length. Results were obtained by 2D-FDTD simulation. The designed grating couplers achieve coupling efficiencies for the TE-like mode over −8 dB (mask overlap) and −3 dB (quadratic variation), at a wavelength of 1550 nm. The coupling scheme considers a 220 nm a-Si:H waveguide and an SMF-28 optical fiber.en
dc.description.versionpublishersversion
dc.description.versionpublished
dc.format.extent13933549
dc.identifier.doi10.3390/photonics11090783
dc.identifier.issn2304-6732
dc.identifier.otherPURE: 107303547
dc.identifier.otherPURE UUID: f3fbb25c-c3f3-48ec-9894-e4470d28c795
dc.identifier.otherScopus: 85205057328
dc.identifier.otherWOS: 001323497300001
dc.identifier.urihttp://hdl.handle.net/10362/180260
dc.identifier.urlhttps://www.scopus.com/pages/publications/85205057328
dc.language.isoeng
dc.peerreviewedyes
dc.relationinfo:eu-repo/grantAgreement/FCT/Concurso de avaliação no âmbito do Programa Plurianual de Financiamento de Unidades de I&D (2017%2F2018) - Financiamento Base/UIDB%2F00066%2F2020/PT
dc.relationinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F00066%2F2020/PT
dc.relationCentre of Technology and Systems
dc.subjectamorphous silicon
dc.subjectgrating coupler
dc.subjectlight coupling
dc.subjectoff-plane coupling
dc.subjectphotonic waveguide
dc.subjectsilicon-on-insulator
dc.subjectAtomic and Molecular Physics, and Optics
dc.subjectInstrumentation
dc.subjectRadiology Nuclear Medicine and imaging
dc.titleGrating Coupler Design for Low-Cost Fabrication in Amorphous Silicon Photonic Integrated Circuitsen
dc.typejournal article
degois.publication.issue9
degois.publication.titlePhotonics
degois.publication.volume11
dspace.entity.typePublication
oaire.awardNumberUIDB/00066/2020
oaire.awardNumberUIDP/00066/2020
oaire.awardNumber2022.07694.PTDC
oaire.awardTitleCentre of Technology and Systems
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/Concurso de avaliação no âmbito do Programa Plurianual de Financiamento de Unidades de I&D (2017%2F2018) - Financiamento Base/UIDB%2F00066%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F00066%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/2022.07694.PTDC/PT
oaire.fundingStreamConcurso de avaliação no âmbito do Programa Plurianual de Financiamento de Unidades de I&D (2017/2018) - Financiamento Base
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream3599-PPCDT
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccess
relation.isProjectOfPublication649c3ac0-6bed-4cbf-8f96-782c97c47008
relation.isProjectOfPublication1d2038a0-e83e-4e7d-b885-ec08a407735c
relation.isProjectOfPublicationb149cead-cbfc-4075-8206-33884fe3eb92
relation.isProjectOfPublication.latestForDiscovery649c3ac0-6bed-4cbf-8f96-782c97c47008

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