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dc.contributor.authorKalhor, Sen
dc.contributor.authorKindness, SJen
dc.contributor.authorWallis, Ren
dc.contributor.authorBeere, HEen
dc.contributor.authorGhanaatshoar, Men
dc.contributor.authorDegl′innocenti, Ren
dc.contributor.authorKelly, MJen
dc.contributor.authorHofmann, Stephanen
dc.contributor.authorJoyce, Hannahen
dc.contributor.authorRitchie, DAen
dc.contributor.authorDelfanazari, Kavehen
dc.date.accessioned2021-11-04T00:30:23Z
dc.date.available2021-11-04T00:30:23Z
dc.date.issued2021-11-01en
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/330254
dc.description.abstractMetamaterial photonic integrated circuits with arrays of hybrid graphene-superconductor coupled split-ring resonators (SRR) capable of modulating and slowing down terahertz (THz) light are introduced and proposed. The hybrid device optical responses, such as electromagnetic induced transparency (EIT) and group delay, can be modulated in several ways. First, it is modulated electrically by changing the conductivity and carrier concentrations in graphene. Alternatively, the optical response can be modified by acting on the device temperature sensitivity, by switching Nb from a lossy normal phase to a low-loss quantum mechanical phase below the transition temperature (Tc) of Nb. Maximum modulation depths of 57.3 % and 97.61 % are achieved for EIT and group delay at the THz transmission window, respectively. A comparison is carried out between the Nb-graphene-Nb coupled SRR-based devices with those of Au-graphene-Au SRRs and a significant enhancement of the THz transmission, group delay, and EIT responses are observed when Nb is in the quantum mechanical phase. Such hybrid devices with their reasonably large and tunable slow light bandwidth pave the way for the realization of active optoelectronic modulators, filters, phase shifters, and slow light devices for applications in chip-scale quantum communication and quantum processing.
dc.publisherMDPI AG
dc.rightsAll rights reserved
dc.rights.urihttp://www.rioxx.net/licenses/all-rights-reserved
dc.titleActive terahertz modulator and slow light metamaterial devices with hybrid graphene–superconductor photonic integrated circuitsen
dc.typeArticle
prism.issueIdentifier11en
prism.publicationDate2021en
prism.publicationNameNanomaterialsen
prism.volume11en
dc.identifier.doi10.17863/CAM.77695
rioxxterms.versionofrecord10.3390/nano11112999en
rioxxterms.versionAM
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2021-11-01en
dc.contributor.orcidHofmann, Stephan [0000-0001-6375-1459]
dc.contributor.orcidJoyce, Hannah [0000-0002-9737-680X]
dc.contributor.orcidDelfanazari, Kaveh [0000-0002-1386-3855]
dc.identifier.eissn2079-4991
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idEPSRC (EP/P005152/1)
pubs.funder-project-idEPSRC (EP/S019324/1)
cam.orpheus.successTue Feb 01 19:02:08 GMT 2022 - Embargo updated*
cam.orpheus.counter1*
rioxxterms.freetoread.startdate2021-11-01


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