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dc.contributor.authorRen, Yen
dc.contributor.authorWallis, Ren
dc.contributor.authorShah, YDen
dc.contributor.authorJessop, DSen
dc.contributor.authorDegl'Innocenti, Riccardoen
dc.contributor.authorKlimont, Aen
dc.contributor.authorKamboj, Varunen
dc.contributor.authorBeere, Harveyen
dc.contributor.authorRitchie, Daviden
dc.date.accessioned2015-03-05T12:04:15Z
dc.date.available2015-03-05T12:04:15Z
dc.date.issued2014-10-06en
dc.identifier.citationApplied Physics Letters, 105, 141102 (2014); doi: 10.1063/1.4897438en
dc.identifier.issn0003-6951
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/246933
dc.description.abstractA terahertz (THz) optical amplifier based on a 2.9 THz quantum cascade laser (QCL) structure has been demonstrated. By depositing an antireflective coating on the QCL facet, the laser mirror losses are enhanced to fully suppress the lasing action, creating a THz quantum cascade (QC) amplifier. Terahertz radiation amplification has been obtained, by coupling a separate multi-mode THz QCL of the same active region design to the QC amplifier. A bare cavity gain is achieved and shows excellent agreement with the lasing spectrum from the original QCL without the antireflective coating. Furthermore, a maximum optical gain of ∼30 dB with single-mode radiation output is demonstrated.
dc.description.sponsorshipThis work was supported by the Engineering and Physical Sciences Research Council.
dc.languageEnglishen
dc.language.isoenen
dc.publisherAIP
dc.subjectQuantum cascade lasersen
dc.subjectOptical amplifiersen
dc.subjectLaser amplifiersen
dc.subjectAntireflective coatingsen
dc.subjectRefractive indexen
dc.titleSingle mode terahertz quantum cascade amplifieren
dc.typeArticle
dc.description.versionThis is the accepted manuscript of a paper published in Applied Physics Letters, 105, 141102 (2014); doi: 10.1063/1.4897438.en
prism.publicationDate2014en
prism.publicationNameApplied Physics Lettersen
prism.volume105en
dc.rioxxterms.funderEPSRC
rioxxterms.versionofrecord10.1063/1.4897438en
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2014-10-06en
dc.contributor.orcidDegl'Innocenti, Riccardo [0000-0003-2655-1997]
dc.contributor.orcidBeere, Harvey [0000-0001-5630-2321]
dc.contributor.orcidRitchie, David [0000-0002-9844-8350]
dc.identifier.eissn1077-3118
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idEPSRC (EP/J007803/1)
pubs.funder-project-idUNIVERSITY COLLEGE LONDON (FB EPSRC) (EP/J017671/1)


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