A room-temperature mid-infrared photodetector for on-chip molecular vibrational spectroscopy

dc.citation.articleNumber101105en_US
dc.citation.issueNumber10en_US
dc.citation.journalTitleApplied Physics Lettersen_US
dc.citation.volumeNumber113en_US
dc.contributor.authorZheng, Boben_US
dc.contributor.authorZhao, Hangqien_US
dc.contributor.authorCerjan, Benen_US
dc.contributor.authorYazdi, Sadeghen_US
dc.contributor.authorRinge, Emilieen_US
dc.contributor.authorNordlander, Peteren_US
dc.contributor.authorHalas, Naomi J.en_US
dc.contributor.orgLaboratory for Nanophotonicsen_US
dc.date.accessioned2018-11-01T19:40:04Zen_US
dc.date.available2018-11-01T19:40:04Zen_US
dc.date.issued2018en_US
dc.description.abstractInfrared (IR) photodetection is of major scientific and technical interest since virtually all molecules exhibit characteristic vibrational modes in the mid-infrared region of the spectrum, giving rise to molecular spectroscopy and chemical imaging in this wavelength range. High-resolution IR spectroscopies, such as Fourier Transform IR spectroscopy, typically require large, bulky optical measurement systems and expensive photodetector components. Here, we present a high-responsivity photodetector for the mid-IR spectral region which operates at room temperature. Fabricated from silicon and aluminum, the photodetection mechanism is based on free carrier absorption, giving rise to a photoresponse rivalling commercially available cooled IR photodetectors. We demonstrate that infrared spectra of molecules deposited on this detector can be obtained by a direct electrical read-out. This work could pave the way for simple, fully integrated chemical sensors and other applications, such as chemical imaging, which would benefit from the combination of mid-IR detection, room-temperature operation, and ultracompact portability.en_US
dc.identifier.citationZheng, Bob, Zhao, Hangqi, Cerjan, Ben, et al.. "A room-temperature mid-infrared photodetector for on-chip molecular vibrational spectroscopy." <i>Applied Physics Letters,</i> 113, no. 10 (2018) AIP Publishing: https://doi.org/10.1063/1.5045663.en_US
dc.identifier.doihttps://doi.org/10.1063/1.5045663en_US
dc.identifier.urihttps://hdl.handle.net/1911/103287en_US
dc.language.isoengen_US
dc.publisherAIP Publishingen_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.titleA room-temperature mid-infrared photodetector for on-chip molecular vibrational spectroscopyen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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