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SIS Detectors for Terahertz Photon Counting System

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Abstract

An Intensity interferometer with photon counting detector is a candidate to realize a THz interferometer for astronomical observations. We have demonstrated that synthesis imaging is possible even with intensity interferometers. An SIS junction (or STJ) with low leakage current of 1 pA is a suitable device for photon counting detectors. Readout circuit utilizing FETs with low gate leakage, low gate capacitance, and fast response is discussed.

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Acknowledgments

The authors thank Dr. Hirokazu Ikeda, Dr. Manobu Tanaka, Dr. Yasunori Hibi, and Dr. Takafumi Kojima for fruitful discussions and their supports. We would like to acknowledge SONY cooperation for providing us their GaAs-JFET and JPHEMT devices for evaluation. The authors also would like to thank Yokogawa Electric Corporation for providing us the opportunity to use and evaluate their product. This research was financially supported by Matsuo Foundation, ISAS/JAXA, and Grant-in-Aid for Exploratory Research of JSPS KAKENHI Grant Number 15K13469.

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Authors and Affiliations

  1. National Astronomical Observatory of Japan (NAOJ), Mitaka, Tokyo, 181-8588, Japan

    Hajime Ezawa & Hiroshi Matsuo

  2. National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, 305-8568, Japan

    Masahiro Ukibe, Go Fujii & Shigetomo Shiki

Authors
  1. Hajime Ezawa
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  2. Hiroshi Matsuo
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  3. Masahiro Ukibe
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  4. Go Fujii
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  5. Shigetomo Shiki
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Correspondence to Hajime Ezawa.

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Ezawa, H., Matsuo, H., Ukibe, M. et al. SIS Detectors for Terahertz Photon Counting System. J Low Temp Phys 184, 244–249 (2016). https://doi.org/10.1007/s10909-015-1465-9

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  • DOI: https://doi.org/10.1007/s10909-015-1465-9

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