Thermally tunable ultrasensitive infrared absorption spectroscopy platforms based on thin phase-change films

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dc.citation.epage1407en_US
dc.citation.issueNumber12en_US
dc.citation.spage1403en_US
dc.citation.volumeNumber1en_US
dc.contributor.authorBakan, G.en_US
dc.contributor.authorAyas S.en_US
dc.contributor.authorOzgur E.en_US
dc.contributor.authorCelebi, K.en_US
dc.contributor.authorDana, A.en_US
dc.date.accessioned2018-04-12T10:50:22Z
dc.date.available2018-04-12T10:50:22Z
dc.date.issued2016-11en_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.description.abstractThe thermal tunability of the optical and electrical properties of phase-change materials has enabled the decades-old rewritable optical data storage and the recently commercialized phase-change memory devices. Recently, phase-change materials, in particular, Ge2Sb2Te5 (GST), have been considered for other thermally configurable photonics applications, such as active plasmonic surfaces. Here, we focus on nonplasmonic field enhancement and demonstrate the use of the phase-change materials in ultrasensitive infrared absorption spectroscopy platforms employing interference-based uniform field enhancement. The studied structures consist of patternless thin GST and metal films, enabling simple and large-area fabrication on rigid and flexible substrates. Crystallization of the as-fabricated amorphous GST layer by annealing tunes (redshifts) the field-enhancement wavelength range. The surfaces are tested with ultrathin chemical and biological probe materials. The measured absorption signals are found to be comparable or superior to the values reported for the ultrasensitive infrared absorption spectroscopy platforms based on plasmonic field-enhancement.en_US
dc.description.provenanceMade available in DSpace on 2018-04-12T10:50:22Z (GMT). No. of bitstreams: 1 bilkent-research-paper.pdf: 179475 bytes, checksum: ea0bedeb05ac9ccfb983c327e155f0c2 (MD5) Previous issue date: 2016en
dc.identifier.doi10.1021/acssensors.6b00591en_US
dc.identifier.issn2379-3694
dc.identifier.urihttp://hdl.handle.net/11693/36712
dc.language.isoEnglishen_US
dc.publisherAmerican Chemical Societyen_US
dc.relation.isversionofhttps://doi.org/10.1021/acssensors.6b00591en_US
dc.source.titleACS Sensorsen_US
dc.subjectGeSbTeen_US
dc.subjectInfrared absorption spectroscopyen_US
dc.subjectInterference coatingsen_US
dc.subjectPhase-changeen_US
dc.subjectSensingen_US
dc.titleThermally tunable ultrasensitive infrared absorption spectroscopy platforms based on thin phase-change filmsen_US
dc.typeArticleen_US

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