A room-temperature mid-infrared photodetector for on-chip molecular vibrational spectroscopy
dc.citation.articleNumber | 101105 | |
dc.citation.issueNumber | 10 | |
dc.citation.journalTitle | Applied Physics Letters | |
dc.citation.volumeNumber | 113 | |
dc.contributor.author | Zheng, Bob | |
dc.contributor.author | Zhao, Hangqi | |
dc.contributor.author | Cerjan, Ben | |
dc.contributor.author | Yazdi, Sadegh | |
dc.contributor.author | Ringe, Emilie | |
dc.contributor.author | Nordlander, Peter | |
dc.contributor.author | Halas, Naomi J. | |
dc.contributor.org | Laboratory for Nanophotonics | |
dc.date.accessioned | 2018-11-01T19:40:04Z | |
dc.date.available | 2018-11-01T19:40:04Z | |
dc.date.issued | 2018 | |
dc.description.abstract | Infrared (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.identifier.citation | Zheng, 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. | |
dc.identifier.doi | https://doi.org/10.1063/1.5045663 | |
dc.identifier.uri | https://hdl.handle.net/1911/103287 | |
dc.language.iso | eng | |
dc.publisher | AIP Publishing | |
dc.rights | Article 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. | |
dc.title | A room-temperature mid-infrared photodetector for on-chip molecular vibrational spectroscopy | |
dc.type | Journal article | |
dc.type.dcmi | Text | |
dc.type.publication | publisher version |
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