MIMIM photodetectors using plasmonically enhanced MIM absorbers

buir.contributor.authorOkyay, Ali Kemal
dc.citation.epage100991C-7en_US
dc.citation.spage100991C-1en_US
dc.citation.volumeNumber10099en_US
dc.contributor.authorDereshgi, S. Abedinien_US
dc.contributor.authorOkyay, Ali Kemalen_US
dc.coverage.spatialSan Francisco, California, United Statesen_US
dc.date.accessioned2018-04-12T11:44:02Z
dc.date.available2018-04-12T11:44:02Z
dc.date.issued2017en_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.descriptionConference name: Proceedings of SPIE, Physics, Simulation, and Photonic Engineering of Photovoltaic Devices VIen_US
dc.descriptionDate of Conference: 30 January–1 February 2017en_US
dc.description.abstractWe demonstrate super absorbing metal-insulator-metal (MIM) stacks and MIMIM photosensitive devices operating at visible and near-infrared (VIS-NIR) spectrum, where absorbing (top) MIM and photocollecting (bottom) MIM can be optimized separately. We investigate different bottom metals in absorbing MIM with nanoparticles realized by dewetting of silver thin film on top. While gold and silver have conventionally been considered the most appropriate plasmonic absorbers, we demonstrate different absorbing metals like aluminum and specifically chromium, with its plasma frequency happening at 850 nm, as more efficient layers for absorption. Absorption in chromium hits 82 percent around 1000 nm. We provide convincing evidences by doing reflection experiment and computational simulations for absorbing MIM part. We also suggest for the first time investigating electric loss tangent of metal or coherently, surface plasmon quality factor of absorbing metals which are reliable tools for engineering different metal layers. They reveal that despite the fact that gold and silver are good plasmonic scatterers in VIS-NIR and reliable absorbers in VIS region, they are not proper choices as absorbers for NIR applications. Once the most optimum absorbing design is pointed out, we integrate it on top of another metal-insulator to form an MIMIM photodetector with tunneling photocurrent path. The final optimized sample consisting of silver - hafnium oxide - chromium - aluminum oxide - silver nanoparticles (from bottom to top) has a dark current of 7nA and a photoresponsivity peak of 0.962 mA/W at 1000 nm and a full width at half maximum of 300 nm, while applied bias is 50 mV and device areas are 300 μm x 600 μm. This photoresponse shows 70 times enhancement compared to former reported spin coated rare nanoparticle MIMIMs.en_US
dc.description.provenanceMade available in DSpace on 2018-04-12T11:44:02Z (GMT). No. of bitstreams: 1 bilkent-research-paper.pdf: 179475 bytes, checksum: ea0bedeb05ac9ccfb983c327e155f0c2 (MD5) Previous issue date: 2017en
dc.identifier.doi10.1117/12.2253026en_US
dc.identifier.eissn1996-756Xen_US
dc.identifier.isbn9781510606395
dc.identifier.issn0277-786X
dc.identifier.urihttp://hdl.handle.net/11693/37564
dc.language.isoEnglishen_US
dc.publisherSPIEen_US
dc.relation.isversionofhttp://dx.doi.org/10.1117/12.2253026en_US
dc.source.titleProceedings of SPIEen_US
dc.subjectDewettingen_US
dc.subjectMIMIMen_US
dc.subjectPhotodetectorsen_US
dc.subjectPhotoresponsivityen_US
dc.subjectPhotovoltaicen_US
dc.subjectPlasmonic absorberen_US
dc.subjectTunnelingen_US
dc.subjectAluminumen_US
dc.subjectChromiumen_US
dc.subjectElectric lossesen_US
dc.subjectElectric toolsen_US
dc.subjectElectron tunnelingen_US
dc.subjectGolden_US
dc.subjectHafnium oxidesen_US
dc.subjectInfrared devicesen_US
dc.subjectMetal insulator boundariesen_US
dc.subjectMetal nanoparticlesen_US
dc.subjectMetalsen_US
dc.subjectNanoparticlesen_US
dc.subjectOxidesen_US
dc.subjectPhotodetectorsen_US
dc.subjectPhotonic devicesen_US
dc.subjectPhotonsen_US
dc.subjectPlasmonsen_US
dc.subjectSilveren_US
dc.subjectDe-wettingen_US
dc.subjectMIMIMen_US
dc.subjectPhotoresponsivityen_US
dc.subjectPhotovoltaicen_US
dc.subjectPlasmonic absorberen_US
dc.subjectMIM devicesen_US
dc.titleMIMIM photodetectors using plasmonically enhanced MIM absorbersen_US
dc.typeConference Paperen_US

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