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Development of THz Superconducting Detectors at PMO S.C. Shi Purple Mt Observatory, CAS, China Key Lab of Radio Astronomy, CAS, China

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Introduction THz Superconducting SIS & HEB Mixers THz Superconducting Imaging Array (TeSIA) TeSIA Developed with TES & MKIDs Conclusion Outline

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Credit: S. Yamamoto Why Care About THz ? Structure formation in universe Evolution history of matter Fluctuation in early universe Galaxy formation Star formation Planet formation

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1996Cooled Schottky receiver 19981 st SIS receiver in China 2002Upgraded SIS for multi-lines 20101 st Focal-plane receiver with 2SB SIS mixers with 2SB SIS mixers 13.7m @ 0.1THz 1996Room-temperature Schottky receiver 20051 st submm SIS receiver in China 20071 st NbN SIS mixer ever used in astronomy POST @ 0.5THz Development for 13.7m & POST 4

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4K cryostat LO unit FFTS Digital bias Post IF unit Overall View of SSAR LO IF hybrid HEMT LNA HBT LNA Inside 4K Cryostat 2SB SIS Ji Yang, Wenlei Shan, Shengcai Shi, Qijun Yao, Yinxi Zuo, Shanhuai Chen, Aiqin Cao, Zhenhui Lin,The Superconducting Spectroscopic Array Receiver (SSAR) for Millimeter-wave Radio Astronomy, GSMM 2008, Nanjing, China, eds. Zhenghe Feng and Wei Hong, April 2008 (invited). 0.1THz Multibeam Receiver: SSAR 5

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Imaging Observation with SSAR 40mins700mins 6

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9.5K ~16K Appl Phys Lett (2008) 92: 222504. IEEE Trans Appl Supercond (2009)19: 417. 0.5THz NbN SIS mixer firstly used for astronomy 0.5THz NbN Supercond. SIS Mixer 7

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courtesy of ALMA Band 8Band 10 courtesy of SMA 2000Development of submm SIS mixers, testing & observation on SMA 2003Joint development of Band8 (385-500GHz) & Band10(787-950GHz) SIS mixers Collaboration on SMA & ALMA 8 credit: NRAO NGC 6302

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Dome A Basic facts about Dome A Altitude: 4093m (60km 10km) Lowest temp: -83 A plateau of small fluctuation 1300km from Chinas Zhongshan station Extremely good THz/IR windows Where Is Dome A ?

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