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Sensitivity and noise in THz electro-optic upconversion radiometers

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dc.affiliation.dptoUC3M. Departamento de Teoría de la Señal y Comunicacioneses
dc.affiliation.grupoinvUC3M. Grupo de Investigación: Radiofrecuencia, Electromagnetismo, Microondas y Antenas (GREMA)es
dc.contributor.authorSantamaría Botello, Gabriel Arturo
dc.contributor.authorPopovic, Zoya
dc.contributor.authorAbdalmalak Dawoud, Kerlos Atia
dc.contributor.authorSegovia Vargas, Daniel
dc.contributor.authorBrown, Elliott R.
dc.contributor.authorGarcía Muñoz, Luis Enrique
dc.contributor.funderComunidad de Madrides
dc.contributor.funderMinisterio de Economía y Competitividad (España)es
dc.date.accessioned2023-01-30T15:04:37Z
dc.date.available2023-01-30T15:04:37Z
dc.date.issued2020-06-10
dc.description.abstractThis paper presents a study of noise in room-temperature THz radiometers that use THz-to-optical upconversion followed by optical detection of thermal radiation. Despite some undesired upconverted thermal noise, no noise is intrinsically introduced by efcient electro-optic modulation via a sumfrequency-generation process in high quality factor (Q) whispering-gallery mode (WGM) resonators. However, coherent and incoherent optical detection results in fundamentally diferent noise characteristics. The analysis shows that the upconversion receiver is quantum limited like conventional amplifers and mixers, only when optical homodyne or heterodyne detection is performed. However, this type of receiver shows advantages as a THz photon counter, where counting is in the optical domain. Theoretical predictions show that upconversion-based room-temperature receivers can outperform state-of-the-art cooled and room-temperature THz receivers based on low-noise amplifers and mixers, provided that a photon conversion efciency greater than 1% is realized. Although the detection bandwidth is naturally narrow due to the highly resonant electro-optic modulator, it is not fundamentally limited and can be broadened by engineering selective optical coupling mechanisms to the resonator.en
dc.description.sponsorshipMinisterio de Economía y Competitividad (MINECO) (TEC2013-47753-C3); Comunidad de Madrid MARTINLARA Project (ref. P2018/NMT-4333); FUNDACION SENER; Banco Santander (TEC2016-76997- C3-2-R); 2017 UC3M-Santander Chair of Excellence.en
dc.format.extent13
dc.identifier.bibliographicCitationSantamaría-Botello, G., Popovic, Z., Abdalmalak, K. A., Segovia-Vargas, D., Brown, E. R. & García Muñoz, L. E. (2020). Sensitivity and noise in THz electro-optic upconversion radiometers. Scientific Reports, 10(1), 9403.en
dc.identifier.doihttps://doi.org/10.1038/s41598-020-65987-x
dc.identifier.issn2045-2322
dc.identifier.publicationfirstpage1
dc.identifier.publicationissue1, 9403
dc.identifier.publicationlastpage13
dc.identifier.publicationtitleScientific Reportsen
dc.identifier.publicationvolume10
dc.identifier.urihttps://hdl.handle.net/10016/36413
dc.identifier.uxxiAR/0000027787
dc.language.isoengen
dc.publisherNature Researchen
dc.relation.projectIDGobierno de España. TEC2013-47753-C3-2-Res
dc.relation.projectIDGobierno de España. TEC2016-76997-C3-2-Res
dc.relation.projectIDComunidad de Madrid. P2018/NMT-4333es
dc.rights© The Author(s) 2020.en
dc.rightsAtribución 3.0 España*
dc.rights.accessRightsopen accessen
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/es/*
dc.subject.ecienciaElectrónicaes
dc.subject.ecienciaIngeniería Industriales
dc.subject.ecienciaÓpticaes
dc.subject.ecienciaTelecomunicacioneses
dc.subject.otherNonlinear opticsen
dc.subject.otherOptical physicsen
dc.subject.otherOptics and photonicsen
dc.titleSensitivity and noise in THz electro-optic upconversion radiometersen
dc.typeresearch article*
dc.type.hasVersionVoR*
dspace.entity.typePublication
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