Please use this identifier to cite or link to this item: https://doi.org/10.1002/adom.202000337
DC FieldValue
dc.titleHigh-Responsivity Mid-Infrared Black Phosphorus Slow Light Waveguide Photodetector
dc.contributor.authorMa, Yiming
dc.contributor.authorDong, Bowei
dc.contributor.authorWei, Jingxuan
dc.contributor.authorChang, Yuhua
dc.contributor.authorHuang, Li
dc.contributor.authorAng, Kah-Wee
dc.contributor.authorLee, Chengkuo
dc.date.accessioned2021-04-07T10:23:34Z
dc.date.available2021-04-07T10:23:34Z
dc.date.issued2020
dc.identifier.citationMa, Yiming, Dong, Bowei, Wei, Jingxuan, Chang, Yuhua, Huang, Li, Ang, Kah-Wee, Lee, Chengkuo (2020). High-Responsivity Mid-Infrared Black Phosphorus Slow Light Waveguide Photodetector. ADVANCED OPTICAL MATERIALS 8 (13). ScholarBank@NUS Repository. https://doi.org/10.1002/adom.202000337
dc.identifier.issn21951071
dc.identifier.issn21951071
dc.identifier.urihttps://scholarbank.nus.edu.sg/handle/10635/188707
dc.description.abstractBlack phosphorus (BP) offers unique opportunities for mid-infrared (MIR) waveguide photodetectors due to its narrow direct bandgap and layered lattice structure. Further miniaturization of the photodetector will improve operation speed, signal-to-noise ratio, and internal quantum efficiency. However, it is challenging to maintain high responsivities in miniaturized BP waveguide photodetectors because of reduced light–matter interaction lengths. To address this issue, a method utilizing the slow light effect in photonic crystal waveguides (PhCWGs) is proposed and experimentally demonstrated. A shared-BP photonic system is proposed and utilized to fairly and precisely characterize the slow light enhancement. Close to the band edge around 3.8 µm, the responsivity is enhanced by more than tenfold in the BP photodetector on a 10 µm long PhCWG as compared with the counterpart on a subwavelength grating waveguide. At a 0.5 V bias, the BP PhCWG photodetector achieves a 11.31 A W responsivity and a 0.012 nW Hz noise equivalent power. The trap-induced photoconductive gain is validated as both the dominant photoresponse mechanism and the major limiting factor of the response speed. The BP slow light waveguide photodetector is envisioned to realize miniaturized high-performance on-chip MIR systems for widespread applications including environmental monitoring, industrial process control, and medical diagnostics. −1 −1/2
dc.language.isoen
dc.publisherWILEY-V C H VERLAG GMBH
dc.sourceElements
dc.subjectScience & Technology
dc.subjectTechnology
dc.subjectPhysical Sciences
dc.subjectMaterials Science, Multidisciplinary
dc.subjectOptics
dc.subjectMaterials Science
dc.subjectblack phosphorus
dc.subjectmid-infrared
dc.subjectphotodetectors
dc.subjectslow light
dc.subjectwaveguides
dc.subjectGRAPHENE PHOTODETECTOR
dc.subjectSILICON PHOTONICS
dc.subjectINTEGRATION
dc.subjectCHIP
dc.typeArticle
dc.date.updated2021-04-07T05:13:51Z
dc.contributor.departmentDEPT OF COMPUTER SCIENCE
dc.contributor.departmentDEPT OF ELECTRICAL & COMPUTER ENGG
dc.description.doi10.1002/adom.202000337
dc.description.sourcetitleADVANCED OPTICAL MATERIALS
dc.description.volume8
dc.description.issue13
dc.published.statePublished
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