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Superconducting Terahertz Sources with 12% Power Efficiency
Stockholm University, Faculty of Science, Department of Physics.ORCID iD: 0000-0002-5935-7165
Stockholm University, Faculty of Science, Department of Physics.ORCID iD: 0000-0003-4815-5856
Stockholm University, Faculty of Science, Department of Physics. National Academy of Sciences of Ukraine, Ukraine.ORCID iD: 0000-0002-7212-434X
Stockholm University, Faculty of Science, Department of Physics. Moscow Institute of Physics and Technology, Russia.ORCID iD: 0000-0002-3131-8658
Number of Authors: 42021 (English)In: Physical Review Applied, E-ISSN 2331-7019, Vol. 16, no 6, article id L061001Article in journal, Letter (Refereed) Published
Abstract [en]

Low power efficiency is one of the main problems of terahertz (THz) sources, colloquially known as “the THz gap.” In this work we present prototypes of THz devices based on whisker crystals of a high-temperature superconductor Bi2Sr2CaCu2O8+δ with a record high-radiation power efficiency of 12% at a frequency of approximately 4 THz. We employ various on- and off-chip detection techniques and, in particular, use the radiative cooling phenomenon for accurate evaluation of the emission power. We conclude that such devices can be used for creation of tunable, monochromatic, cw, compact, and power-efficient THz sources.

Place, publisher, year, edition, pages
2021. Vol. 16, no 6, article id L061001
Keywords [en]
Coherent THz sources, Superconductivity, Josephson effect
National Category
Condensed Matter Physics
Research subject
Physics
Identifiers
URN: urn:nbn:se:su:diva-200556DOI: 10.1103/PhysRevApplied.16.L061001ISI: 000731544400003Scopus ID: 2-s2.0-85121578410OAI: oai:DiVA.org:su-200556DiVA, id: diva2:1625385
Available from: 2022-01-07 Created: 2022-01-07 Last updated: 2022-11-17Bibliographically approved
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Cattaneo, RogerBorodianskyi, Evgenii A.Kalenyuk, Aleksey A.Krasnov, Vladimir M.

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