Detection of Coherent Terahertz Radiation from a High-Temperature Superconductor Josephson Junction by a Semiconductor Quantum-Dot Detector

Rais Shaikhaidarov, Vladimir Antonov, Andrew Casey, Alexei Kalaboukhov, S Kubatkin, Yuichi Harada, K Onomitsu, Alexander Tsalenchuk, A Sobolev

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We examine the application of Josephson radiation emitters to spectral calibration of single-photon- resolving detectors. Josephson junctions are patterned in a YBCO film on a bicrystal sapphire substrate and are voltage controlled to generate radiation in the frequency range of 0.05–1 THz. The detector used in this work consists of a gate-defined quantum-dot photon-to-charge transducer coupled to a single-electron transistor. Both the emitter and the detector are equipped with a matching on-chip wide-band antenna. The combination of a tuneable emitter and detector allows us to determine the efficacy of the YBCO emitter and also to analyze the elementary processes involved in the detection.
Original languageEnglish
Article number024010
Pages (from-to)1-6
Number of pages6
JournalPhysical Review Applied
Issue number2
Publication statusPublished - 22 Feb 2016


  • terahertz
  • Josephson Junctions

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