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Terahertz detector based on a superconducting tunnel junction coupled to a thin superconductor film

机译:基于耦合到超导薄膜的超导隧道结的太赫兹探测器

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摘要

The principle of a terahertz detector using a superconducting tunnel junction (STJ) coupled to a large terahertz-absorbing superconductor film is verified. We have detected terahertz radiation based on the Cooper-pair breaking process, and confirmed that the sensitivity has a sharp increase around 0.7 THz, a value that is in agreement with the gap frequency of the superconducting Nb. For high-sensitivity terahertz detection, we propose an improved design of the STJ detector composed of a smaller junction coupled to a thinner superconductor film. We also discuss the expected noise equivalent power of the optimized detector.
机译:验证了使用耦合到大的吸收太赫兹的超导薄膜的超导隧道结(STJ)的太赫兹检测器的原理。我们已经基于库珀对的断裂过程检测到了太赫兹辐射,并确认灵敏度在0.7 THz附近急剧增加,该值与超导Nb的间隙频率一致。对于高灵敏度太赫兹检测,我们提出了一种改进的STJ检测器设计,该检测器由一个较小的结耦合到一个较薄的超导膜组成。我们还将讨论优化检测器的预期噪声等效功率。

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  • 来源
    《Applied Physicsletters》 |2009年第19期|193504.1-193504.3|共3页
  • 作者单位

    Terahertz-wave Research Group, RIKEN, 519-1399 Aramaki-Aoba, Aoba-ku, Sendai 980-0845, Japan;

    Saitama University, 255 Shimo-Ohkubo, Saitama 338-8570, Japan;

    Terahertz-wave Research Group, RIKEN, 519-1399 Aramaki-Aoba, Aoba-ku, Sendai 980-0845, Japan;

    Radiation Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan;

    National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan;

    Terahertz-wave Research Group, RIKEN, 519-1399 Aramaki-Aoba, Aoba-ku, Sendai 980-0845, Japan Tohoku University, 6-3 Aramaki-Aoba, Aoba-ku, Sendai 980-8578, Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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