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Developmet of Phono-mediated Terahertz Detectors using Superconducting Tunnel Junctions

Research Project

Project/Area Number 15360040
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Applied physics, general
Research InstitutionRIKEN

Principal Investigator

OTANI Chiko  RIKEN, Terahertz Sensing and Imaging Laboratory, Laboratory Head, テラヘルツイメージング研究チーム, チームリーダー (50281663)

Co-Investigator(Kenkyū-buntansha) KAWASE Kodo  RIKEN, Kawase Initiative Research Unit, Unit Leader, 川瀬独立主幹研究ユニット, 独立主幹研究員 (00296013)
YAMASHITA Masatsugu  RIKEN, Kawase Initiative Research Unit, Special Postdoctral Researcher, 川瀬独立主幹研究ユニット, 基礎科学特別研究員 (10360661)
DOBROIU Adrian C.  RIKEN, Kawase Initiative Research Unit, Unit Researcher, 川瀬独立主幹研究ユニット, ユニット研究員 (90391846)
SATO Hiromi  RIKEN, Enyo Radiation Laboratory, Senior Researcher, 延與放射線研究室, 先任研究員 (20300874)
牧 謙一郎  独立行政法人理化学研究所, 川瀬独立主幹研究ユニット, ユニット研究員 (50392121)
清水 裕彦  独立行政法人理化学研究所, イメージ情報研究ユニット, 研究ユニットリーダー (50249900)
滝澤 慶之  独立行政法人理化学研究所, イメージ情報研究ユニット, 協力研究員 (70312246)
Project Period (FY) 2003 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥15,300,000 (Direct Cost: ¥15,300,000)
Fiscal Year 2005: ¥2,900,000 (Direct Cost: ¥2,900,000)
Fiscal Year 2004: ¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2003: ¥8,800,000 (Direct Cost: ¥8,800,000)
KeywordsTerahertz wave / Detector / Superconducting Tunnel Junction / Phonon-mediated detector
Research Abstract

First, we fabricated a phonon-mediated terahertz detector using superconducting tunnel junctions (STJs). The layer structure is Nb/Al/AlOx/Al/Nb fabricated on LiNbO_3 and LiTaO_3 substrates. The sizes ranged from 5 to 200μm square. The subgap leakage current at 4.2, 1.5 and 0.35K showed the similar values with the STJs fabricated on conventional Si and sapphire substrates. This means that the new substrates can be used in high-performance terahertz detector. Then, we designed and made a new optical components for our cryostat. Using this setup, we irradiated pulsed terahertz waves and read the signals from the detectors through a charge-sensitive preamplifier. We successfully detected the corresponding pulse signals for the first time. In addition, we confirmed that the rise time of the pulse signal was relatively long, showing that the detection process was consistent with the phonon-mediated detection.
Next, we analyzed the detected pulse shapes and found that one pulse included two different pulses with the relatively short and long risetime, respectively. They were distinguished by applying the time derivative of the output charge. Combined this result with X-ray measurements, they were identified as the events directly absorbed with the superconducting electrode and the phonon-mediated events. We also checked the frequency response and confirmed the flat spectral response in 1-2 THz.
Moreover, we introduced (1) thicker substrates for increasing the efficiency, (2) a series array detector to increase the detection area, and (3) the STJs with larger bottom electrode and smaller top electrode. In (1), we observed the increase of the efficiency. In (2), we could not get the greater signal. In (3), we fabricated STJs with the different size from 25-70μm and evaluated the mean free path of the quasiperticles inside the superconducting electrode.

Report

(4 results)
  • 2005 Annual Research Report   Final Research Report Summary
  • 2004 Annual Research Report
  • 2003 Annual Research Report
  • Research Products

    (23 results)

All 2006 2005 2004 Other

All Journal Article (19 results) Publications (4 results)

  • [Journal Article] テラヘルツイメージングと安心・安全分野への応用2006

    • Author(s)
      大谷知行, 有吉誠一郎, 佐々木芳彰, 川瀬晃道
    • Journal Title

      応用物理学会誌 75・2

      Pages: 188-195

    • NAID

      10017253165

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] Direct and Indirect Detection of Terahertz Waves using a Nb-based Superconducting Tunnel Junction2006

    • Author(s)
      C.Otani, R.Nakano, T.Taino, T.Shibuya, S.Ariyoshi ほか6名
    • Journal Title

      Institute of Physics Conference Series (出版中)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] 超伝導トンネル接合素子を用いたテラヘルツ波検出器アレイの開発とイメージング(招待論文)2006

    • Author(s)
      大谷知行, 有吉誠一郎, 田井野徹, 川瀬晃道, ほか2名
    • Journal Title

      信学技報 105・629

      Pages: 1-6

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Terahertz imaging and its applications in security and safety2006

    • Author(s)
      C.Otani, S.Ariyoshi, Y.Sasaki, K.Kawase
    • Journal Title

      Oyo Butsuri 75-2

      Pages: 188-195

    • NAID

      10017253165

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Direct and indirect detection of terahertz waves using a Nb-based superconducting tunnel junction2006

    • Author(s)
      C.Otani, R.Nakano, T.Taino, T.Shibuya, S.Ariyoshi et al.
    • Journal Title

      Institute of Physics Conference Series (in press)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Development of terahertz detector array and using superconducting tunnel junctions and terahertz imaging (invited paper)2006

    • Author(s)
      C.Otani, S.Ariyoshi, T.Taino, K.Kawase et al.
    • Journal Title

      Shingaku Gihou 105-629

      Pages: 1-6

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] 超伝導トンネル接合素子を用いたテラヘルツ波検出器アレイの開発とイメージング(招待論文)2006

    • Author(s)
      大谷知行, 有吉誠一郎, 田井野徹, 川瀬晃道, ほか2名
    • Journal Title

      信学技報 105・486

      Pages: 1-6

    • Related Report
      2005 Annual Research Report
  • [Journal Article] A Broad-band THz Radiation Detector using a Nb-based Superconducting Tunnel Junction2005

    • Author(s)
      C.Otani, T.Taino, R.Nakano, K.Hoshino, T.Shibuya ほか6名
    • Journal Title

      IEEE Transactions on Applied Superconductivity 15・2

      Pages: 591-594

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] The Effect of X-ray Irradiating Superconducting Tunnel Junctions on Al_2O_3 and LiNbO_3 substrates2005

    • Author(s)
      T.Taino, K.Hoshino, R.Nakano, C.Otani, H.Myoren ほか4名
    • Journal Title

      IEEE Transactions on Applied Superconductivity 15・2

      Pages: 599-601

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] テラヘルツイメージングと応用(依頼論文)2005

    • Author(s)
      大谷知行, 小川雄一, 山下将嗣, 川瀬晃道
    • Journal Title

      Jasco Report 47・2

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] A broad-band THz radiation detector using a Nb-based superconducting tunnel junction2005

    • Author(s)
      C.Otani, T.Taino, R.Nakano, K.Hoshino, T.Shibuya, et al.
    • Journal Title

      IEEE Transactions on Applied Superconductivity 15-2

      Pages: 591-594

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] The effect of X-ray irradiating superconducting tunnel junctions on Al_2O_3 and LiNbO_3 substrates2005

    • Author(s)
      T.Taino, K.Hoshino, R.Nakano, C.Otani, H.Myoren, et al.
    • Journal Title

      IEEE Transactions on Applied Superconductivity 15-2

      Pages: 599-601

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Terahertz imaging and its applications2005

    • Author(s)
      C.Otani, Y.Ogawa, Y.Yamashita, K.Kawase
    • Journal Title

      Jasco Report 47-2

      Pages: 11-16

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] テラヘルツイメージングと応用2005

    • Author(s)
      大谷知行, 小川雄一, 山下将嗣, 川瀬晃道
    • Journal Title

      Jasco Report 47・2

      Pages: 11-16

    • NAID

      40007203304

    • Related Report
      2005 Annual Research Report
  • [Journal Article] A Broad-band THz Radiation Detector using a Nb-based Superconducting Tunnel Junction2005

    • Author(s)
      C.Otani, T.Taino, R.Nakano, K.Hoshino, T.Shibuya, 他6名
    • Journal Title

      IEEE Transactions on Applied Superconductivity 15(印刷中)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Difference of X-ray-induced substrate phonon events observed with superconducting tunnel junctions on a sapphire and a LiNbO3 substrates2005

    • Author(s)
      T.Taino, K.Hoshino, R.Nakano, C.Otani, H.Myoren, 他4名
    • Journal Title

      IEEE Transactions on Applied Superconductivity 15(印刷中)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Characterization of an STJ-based Direct Detector of Submillimeter Waves2005

    • Author(s)
      S.Ariyoshi, H.Matsuo, C.Otani, H.Sato, H.M.Shimizu, 他2名
    • Journal Title

      IEEE Transactions on Applied Superconductivity 15(印刷中)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Terahertz Direct Detector Using Superconducting Tunnel Junctions2004

    • Author(s)
      C.Otani, S.Ariyoshi, H.Matsuo, T.Morishima, M.Yamashita, 他3名
    • Journal Title

      SPIE 5354

      Pages: 86-93

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary 2004 Annual Research Report
  • [Journal Article] Terahertz direct detector using superconducting tunnel Junctions2004

    • Author(s)
      C.Otani, S.Ariyoshi, H.Matsuo, T.Morishima, et al.
    • Journal Title

      SPIE 5354

      Pages: 86-93

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Publications] C.Otani, S.Ariyoshi, H.Matsuo, 他5名: "Terahertz direct detector using Superconducting Tunnel Junctions"Proc.SPIE, Terahertz aand Gigahertz Electronics and Photonics III. 5354(in press). (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] M.Yamashita, T.Kiwa, 他2名: "Ebaluation of Spatial Resolution in Laser-Terahertz Emission Microscope for Inspecting Electrical Faults in Integrated Circuit"Proc.SPIE, Terahertz aand Gigahertz Electronics and Photonics III. 5354(in press). (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Sato H., Takizawa Y., Otani C., Siki S., Kurakado M., 他1名: "Detection of hard X-rays using Superconducting Tunnel Junctions"Nuclear Instruments and Methods of Physical Research A. (in press). (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Siki S., Sato H., Otani C., Takizawa Y., 他2名: "Detection of Single Optical Photons with STJ Detectors in RIKEN"Nuclear Instruments and Methods of Physical Research A. (in press). (2004)

    • Related Report
      2003 Annual Research Report

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Published: 2003-04-01   Modified: 2021-04-07  

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