Investigation of bias current and modulation frequency dependences of detectivity of YBCO TES and the effects of coating of Cu-C composite absorber layer

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dc.citation.epage3693en_US
dc.citation.issueNumber4en_US
dc.citation.spage3688en_US
dc.citation.volumeNumber19en_US
dc.contributor.authorMoftakharzadeh, A.en_US
dc.contributor.authorKokabi, A.en_US
dc.contributor.authorBozbey, A.en_US
dc.contributor.authorGhodselahi, T.en_US
dc.contributor.authorVesaghi, M.A.en_US
dc.contributor.authorKhorasani, S.en_US
dc.contributor.authorBanzet, M.en_US
dc.contributor.authorSchubert J.en_US
dc.contributor.authorFardmanesh, M.en_US
dc.date.accessioned2016-02-08T10:03:10Z
dc.date.available2016-02-08T10:03:10Z
dc.date.issued2009en_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.description.abstractBolometric response and noise characteristics of YBCO superconductor transition edge IR detectors with relatively sharp transition and its resulting detectivity are investigated both theoretically and experimentally. The magnitude of response of a fabricated device was obtained for different bias currents and modulation frequencies. Using the measured and calculated bolometric response and noise characteristics, we found and analyzed the device detectivity versus frequency for different bias currents. The detectivity versus chopping frequency of the device did not decrease following the response strongly, due to the decrease of the noise at higher frequencies up to 1 kHz, resulting in maximum detectivity around the modulation frequency of 100 Hz. We also improved the responsivity of the device through the increase of the surface absorption by using a novel infrared absorber, which is made of a copper-carbon composite, coated in a low-temperature process. Within the modulation frequency range studied in this paper, comparison of device detectivity before and after coating is also presented. © 2009 IEEE.en_US
dc.identifier.doi10.1109/TASC.2009.2020866en_US
dc.identifier.issn10518223
dc.identifier.urihttp://hdl.handle.net/11693/22670
dc.language.isoEnglishen_US
dc.relation.isversionofhttp://dx.doi.org/10.1109/TASC.2009.2020866en_US
dc.source.titleIEEE Transactions on Applied Superconductivityen_US
dc.subjectDetectivityen_US
dc.subjectInfrared absorberen_US
dc.subjectTransition edge sensor (TES)en_US
dc.subjectAbsorber layersen_US
dc.subjectBefore and afteren_US
dc.subjectBolometric responseen_US
dc.subjectCarbon compositesen_US
dc.subjectChopping frequencyen_US
dc.subjectDetectivityen_US
dc.subjectFabricated deviceen_US
dc.subjectHigher frequenciesen_US
dc.subjectInfrared absorberen_US
dc.subjectIR detectoren_US
dc.subjectLow-temperature processen_US
dc.subjectModulation frequenciesen_US
dc.subjectNoise characteristicen_US
dc.subjectResponsivityen_US
dc.subjectSharp transitionen_US
dc.subjectSurface absorptionen_US
dc.subjectTransition edge sensor (TES)en_US
dc.subjectYBCO superconductoren_US
dc.subjectCarbon carbon compositesen_US
dc.subjectInfrared absorptionen_US
dc.subjectNanosensorsen_US
dc.subjectYttrium barium copper oxidesen_US
dc.subjectModulationen_US
dc.titleInvestigation of bias current and modulation frequency dependences of detectivity of YBCO TES and the effects of coating of Cu-C composite absorber layeren_US
dc.typeArticleen_US

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