Detection of Coherent Terahertz Radiation from a High-Temperature Superconductor Josephson Junction by a Semiconductor Quantum-Dot Detector
Detection of Coherent Terahertz Radiation from a High-Temperature Superconductor Josephson Junction by a Semiconductor Quantum-Dot Detector
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DOI：
10.1103/physrevapplied.5.024010
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发表时间：
2016-02
影响因子：
4.6
通讯作者：
R. Shaikhaidarov;V. Antonov;A. Casey;A. Kalaboukhov;S. Kubatkin;Y. Harada;K. Onomitsu;A. Tzalenchuk;A. Sobolev
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文献类型：
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作者：
R. Shaikhaidarov;V. Antonov;A. Casey;A. Kalaboukhov;S. Kubatkin;Y. Harada;K. Onomitsu;A. Tzalenchuk;A. Sobolev
我们研究了约瑟夫森辐射发射器在单光子分辨探测器光谱定标中的应用。约瑟夫森结在双晶蓝宝石衬底上的YBCO薄膜上形成图案，并受到电压控制，在0.05-1 THz的频率范围内产生辐射。这项工作中使用的探测器由一个耦合到单电子晶体管的门定义的量子点光子到电荷换能器组成。发射器和探测器都配备了匹配的片上宽带天线。可调谐发射器和探测器的组合使我们能够确定YBCO发射器的效能，并分析检测过程中涉及的基本过程。
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.