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dc.contributor.authorRodriguez, Etienneen_US
dc.contributor.authorMottaghizadeh, Alirezaen_US
dc.contributor.authorGacemi, Djamalen_US
dc.contributor.authorPalaferri, Danieleen_US
dc.contributor.authorAsghari, Zahraen_US
dc.contributor.authorJeannin, Mathieuen_US
dc.contributor.authorVasanelli, Angelaen_US
dc.contributor.authorBigioli, Azzurraen_US
dc.contributor.authorTodorov, Yankoen_US
dc.contributor.authorBeck, Mattiasen_US
dc.contributor.authorFaist, Jeromeen_US
dc.contributor.authorWang, Qi Jieen_US
dc.contributor.authorSirtori, Carloen_US
dc.identifier.citationRodriguez, E., Mottaghizadeh, A., Gacemi, D., Palaferri, D., Asghari, Z., Jeannin, M., ... Sirtori, C. (2018). Room-temperature, wide-band, quantum well infrared photodetector for microwave optical links at 4.9 μm wavelength. ACS Photonics, 5(9), 3689-3694. doi:10.1021/acsphotonics.8b00704en_US
dc.description.abstractHigh-speed, room-temperature, quantum well infrared photodetectors (QWIPs) at λ ∼ 4.9 μm have been realized in a strain compensated In0.1Ga0.9As/Al0.4Ga0.6As heterostructure grown on a GaAs substrate. The high-speed properties at room temperature have been optimized by using a specifically designed air-bridge structure, which greatly reduces the time constant of the effective RC circuit, thus, allowing transmission and detection of high-frequency signals. By modulating a high-speed quantum cascade laser (QCL) centered at λ ∼ 4.7 μm, we were able to record a modulation of the photocurrent up to ∼26 GHz, which is limited by our setup. At 300 K and under a bias voltage of ?5 V our device shows high responsivity and detectivity of 100 mA/W and 1 × 107 Jones, respectively. The developed high-performance QWIPs at this wavelength are highly promising for optical heterodyne measurement, high-speed free space communications in microwave optical links and frequency comb QCLs characterisations.en_US
dc.relation.ispartofACS Photonicsen_US
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Photonics, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
dc.subjectEngineering::Electrical and electronic engineeringen_US
dc.titleRoom-temperature, wide-band, quantum well infrared photodetector for microwave optical links at 4.9 μm wavelengthen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Electrical and Electronic Engineeringen_US
dc.description.versionAccepted versionen_US
dc.subject.keywordsQuantum Devicesen_US
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