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dc.contributor.authorMasini, Len
dc.contributor.authorPitanti, Aen
dc.contributor.authorBaldacci, Len
dc.contributor.authorVitiello, MSen
dc.contributor.authorDegl'Innocenti, Riccardoen
dc.contributor.authorBeere, Harveyen
dc.contributor.authorRitchie, Daviden
dc.contributor.authorTredicucci, Aen
dc.date.accessioned2017-07-07T11:18:42Z
dc.date.available2017-07-07T11:18:42Z
dc.identifier.issn2095-5545
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/265205
dc.description.abstractResonators and the way they couple to external radiation rely on very different concepts if one considers devices belonging to the photonic and electronic worlds. The terahertz frequency range, however, provides intriguing possibilities for the development of hybrid technologies that merge ideas from both fields in novel functional designs. In this paper, we show that high-quality, sub-wavelength, whispering-gallery lasers can be combined to form a linear dipole antenna, which creates a very efficient, low-threshold laser emission in a collimated beam pattern. For this purpose, we employ a terahertz quantum-cascade active region patterned into two 19-μm-radius microdisks coupled by a suspended metallic bridge, which simultaneously acts as an inductive antenna and produces the dipole symmetry of the lasing mode. Continuous-wave vertical emission is demonstrated at approximately 3.5 THz in a very regular, low-divergence (±10°) beam, with a high slope efficiency of at least 160 mW/A and a mere 6 mA of threshold current, which is ensured by the ultra-small resonator size (V_RES/λ³ ≈10‾²). The extremely low power consumption and the superior beam brightness make this concept very promising for the development of miniaturized and portable THz sources to be used in the field for imaging and sensing applications as well as for exploring novel optomechanical intracavity effects.
dc.description.sponsorshipThe authors acknowledge funding from EU through the ERC Advanced Grant SouLMan (GA 321122).
dc.language.isoenen
dc.publisherSpringer Nature
dc.subjectmicroresonatorsen
dc.subjectoptical antennasen
dc.subjectquantum cascade laseren
dc.subjectterahertzen
dc.subjectwhispering galleryen
dc.titleContinuous-wave laser operation of a dipole antenna terahertz microresonatoren
dc.typeArticle
prism.numbere17054en
prism.publicationNameLight: Science and Applicationsen
prism.volume6en
dc.identifier.doi10.17863/CAM.11277
dcterms.dateAccepted2017-03-26en
rioxxterms.versionofrecord10.1038/lsa.2017.54en
rioxxterms.versionAMen
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by-nc-sa/4.0/en
rioxxterms.licenseref.startdate2017-03-26en
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.eissn2047-7538
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idUNIVERSITY COLLEGE LONDON (FB EPSRC) (EP/J017671/1)
pubs.funder-project-idEC FP7 ERC AIG (321122)
cam.issuedOnline2017-10-06en
cam.orpheus.successThu Jan 30 12:53:33 GMT 2020 - The item has an open VoR version.*
rioxxterms.freetoread.startdate2100-01-01


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