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dc.contributor.authorZheng, B
dc.contributor.authorZhao, H
dc.contributor.authorCerjan, B
dc.contributor.authorYazdi, S
dc.contributor.authorRinge, Emilie
dc.contributor.authorNordlander, P
dc.contributor.authorHalas, NJ
dc.date.accessioned2018-11-21T00:30:52Z
dc.date.available2018-11-21T00:30:52Z
dc.date.issued2018-09-03
dc.identifier.issn0003-6951
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/285519
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.
dc.publisherAIP Publishing
dc.rightsAll rights reserved
dc.titleA room-temperature mid-infrared photodetector for on-chip molecular vibrational spectroscopy
dc.typeArticle
prism.issueIdentifier10
prism.publicationDate2018
prism.publicationNameApplied Physics Letters
prism.volume113
dc.identifier.doi10.17863/CAM.32877
dcterms.dateAccepted2018-08-31
rioxxterms.versionofrecord10.1063/1.5045663
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2018-09-03
dc.contributor.orcidYazdi, S [0000-0002-3470-9398]
dc.contributor.orcidRinge, Emilie [0000-0003-3743-9204]
dc.contributor.orcidNordlander, P [0000-0002-1633-2937]
dc.contributor.orcidHalas, NJ [0000-0002-8461-8494]
dc.identifier.eissn1077-3118
rioxxterms.typeJournal Article/Review
cam.issuedOnline2018-09-06
rioxxterms.freetoread.startdate2019-11-20


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