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dc.contributor.author | Miyamoto, Masashi | en |
dc.contributor.author | Kobayashi, Ryota | en |
dc.contributor.author | Kuwano, Genki | en |
dc.contributor.author | Tsujimoto, Manabu | en |
dc.contributor.author | Kakeya, Itsuhiro | en |
dc.contributor.alternative | 宮本, 将志 | ja |
dc.contributor.alternative | 小林, 亮太 | ja |
dc.contributor.alternative | 掛谷, 一弘 | ja |
dc.date.accessioned | 2024-05-27T04:20:51Z | - |
dc.date.available | 2024-05-27T04:20:51Z | - |
dc.date.issued | 2024-03 | - |
dc.identifier.uri | http://hdl.handle.net/2433/287640 | - |
dc.description.abstract | Communication using terahertz (∼10¹²Hz) electromagnetic waves is critical for developing sixth-generation wireless network infrastructures. Conflictions between stable radiation and frequency modulation of terahertz sources impede the superposing of transmitting signals on carrier waves. The Josephson junctions included in a cuprate superconductor radiate terahertz waves with frequencies proportional to the bias voltages. Thus, the modulation of the bias voltage leads to the modulation of the Josephson plasma emission (JPE) frequency. This study aims to demonstrate the generation of frequency-modulated (FM) terahertz continuous waves from Josephson junctions. A FM bandwidth of up to 40 GHz was achieved when 3 GHz sinusoidal waves were superimposed on 840–890 GHz carrier waves radiated by a JPE. The results verify that the instantaneous JPE frequency follows the gigahertz-modulated bias voltage. The wide-band FM terahertz generation by a monolithic device shows a sharp contrast to the mode-lock frequency comb constructed using highly sophisticated optics on a bench. A further increase of the modulation amplitude facilitates up- or downconversion of frequencies over more than one octave. The obtained FM bandwidth exhibited an improvement of two orders of magnitude in the demodulation signal-to-noise ratio compared with the amplitude-modulated waves. The demonstrated FM JPE stimulates further research on terahertz communication technology and metrology using superconducting devices. | en |
dc.language.iso | eng | - |
dc.publisher | Springer Nature | en |
dc.rights | This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: https://doi.org/10.1038/s41566-023-01348-0 | en |
dc.rights | The full-text file will be made open to the public on 10 July 2024 in accordance with publisher's 'Terms and Conditions for Self-Archiving'. | en |
dc.rights | This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 | en |
dc.subject | Frequency combs | en |
dc.subject | Superconducting devices | en |
dc.subject | Terahertz optics | en |
dc.title | Wide-band frequency modulation of a terahertz intrinsic Josephson junction emitter of a cuprate superconductor | en |
dc.type | journal article | - |
dc.type.niitype | Journal Article | - |
dc.identifier.jtitle | Nature Photonics | en |
dc.identifier.volume | 18 | - |
dc.identifier.issue | 3 | - |
dc.identifier.spage | 267 | - |
dc.identifier.epage | 275 | - |
dc.relation.doi | 10.1038/s41566-023-01348-0 | - |
dc.textversion | author | - |
dcterms.accessRights | embargoed access | - |
datacite.date.available | 2024-07-10 | - |
datacite.awardNumber | 20H02606 | - |
datacite.awardNumber | 19H02540 | - |
datacite.awardNumber.uri | https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20H02606/ | - |
datacite.awardNumber.uri | https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-19H02540/ | - |
dc.identifier.pissn | 1749-4885 | - |
dc.identifier.eissn | 1749-4893 | - |
jpcoar.funderName | 日本学術振興会 | ja |
jpcoar.funderName | 日本学術振興会 | ja |
jpcoar.awardTitle | 超伝導固有ジョセフソン接合における多光子レーザー発振の実証 | ja |
jpcoar.awardTitle | 光共振器中の超伝導体ジョセフソン接合におけるテラヘルツ帯レーザー発振の実証 | ja |
出現コレクション: | 学術雑誌掲載論文等 |
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