Self-Mixing Spectra of Terahertz Emitters Based on Bi2Sr2CaCu2O8+? Intrinsic Josephson-Junction Stacks

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dc.authoridKoshelets, Valery P/0000-0002-1563-1257
dc.authoridkizilaslan, olcay/0000-0003-2528-433X
dc.authoridKoshelets, Valery P/0000-0002-1563-1257
dc.authoridKoelle, Dieter/0000-0003-3948-2433
dc.authoridWang, Huabing/0000-0003-4802-6077
dc.authoridYuan, Jie/0000-0002-9639-8273
dc.authoridKinev, Nickolay/0000-0003-0357-212X
dc.authorwosidLi, Jun/G-2113-2015
dc.authorwosidKoshelets, Valery P/B-5797-2011
dc.authorwosidkizilaslan, olcay/ABG-8465-2020
dc.authorwosidYuan, Jie/D-4110-2014
dc.authorwosidxu, wei/HHD-2891-2022
dc.authorwosidKoshelets, Valery P/A-6959-2012
dc.authorwosidKoelle, Dieter/E-5111-2011
dc.contributor.authorHuang, Ya
dc.contributor.authorSun, Hancong
dc.contributor.authorAn, Deyue
dc.contributor.authorZhou, Xianjing
dc.contributor.authorJi, Min
dc.contributor.authorRudau, Fabian
dc.contributor.authorWieland, Raphael
dc.date.accessioned2024-08-04T20:44:06Z
dc.date.available2024-08-04T20:44:06Z
dc.date.issued2017
dc.departmentİnönü Üniversitesien_US
dc.description.abstractJosephson junctions can serve as mixers for electromagnetic radiation, producing difference frequencies vertical bar mf(s)-nf(LO)vertical bar of the signal frequency f(s) and the local oscillator frequency f(LO), where the latter can be provided by ac Josephson currents, and m and n are natural numbers. In order to obtain a better understanding of the purity of the terahertz radiation generated by stacks of intrinsic Josephson junctions (IJJs), we study self-mixing-i.e., f(s) is also produced by Josephson currents inside the stacks-in the difference-frequency range between 0.1 and 3.0 GHz. Simultaneously, we perform off-chip terahertz emission detection and transport measurements. We find that at high-bias currents, when a hot spot has formed in the stack, the power level of self-mixing can be low and sometimes is even absent at the terahertz emission peak, pointing to a good phase locking among all IJJs. By contrast, at low-bias currents where no hot spot exists, the self-mixing products are pronounced even if the terahertz emission peaks are strong. The mixing products at high operation temperature, at which the temperature variation within the stack is moderate, are minor, indicating that the low junction resistance, perhaps in combination with the lowered Josephson critical current density, may play a similar role for synchronization as the hot spot does at low temperature. While these observations are helpful for the task to synchronize thousands of IJJs, the observation of self-mixing in general may offer a simple method in evaluating the coherence of terahertz radiation produced by the IJJ stacks.en_US
dc.description.sponsorshipNational Natural Science Foundation of China [11234006, 61611130069, 11227904, 61371036, 61521001, 61501220]; Fundamental Research Funds for the Central Universities; Jiangsu Key Laboratory of Advanced Techniques for Manipulating Electromagnetic Waves; Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD); RFBR [17-52-12051]; Deutsche Forschungsgemeinschaft [KL930-13/2]; Jiangsu Provincial Natural Science Fund [BK20150561]en_US
dc.description.sponsorshipWe gratefully acknowledge financial support by the National Natural Science Foundation of China (No. 11234006, No. 61611130069, No. 11227904, No. 61371036, No. 61521001, and No. 61501220), the Fundamental Research Funds for the Central Universities and Jiangsu Key Laboratory of Advanced Techniques for Manipulating Electromagnetic Waves, the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), Jiangsu Provincial Natural Science Fund (No. BK20150561), the RFBR Grant No. 17-52-12051, and the Deutsche Forschungsgemeinschaft via project KL930-13/2.en_US
dc.identifier.doi10.1103/PhysRevApplied.8.054023
dc.identifier.issn2331-7019
dc.identifier.issue5en_US
dc.identifier.scopus2-s2.0-85034042897en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org/10.1103/PhysRevApplied.8.054023
dc.identifier.urihttps://hdl.handle.net/11616/98027
dc.identifier.volume8en_US
dc.identifier.wosWOS:000414853600003en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherAmer Physical Socen_US
dc.relation.ispartofPhysical Review Applieden_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectThz Radiationen_US
dc.subjectSuperconductorsen_US
dc.subjectEmissionen_US
dc.titleSelf-Mixing Spectra of Terahertz Emitters Based on Bi2Sr2CaCu2O8+? Intrinsic Josephson-Junction Stacksen_US
dc.typeArticleen_US

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