Research activities on superconducting electronics (SNSPD and SQUID)

Lixing YOU

State Key Laboratory of Functional Materials for Informatics,
Shanghai Institute of Microsystem and Information Technology (SIMIT)
Chinese Academy of Science (CAS), China


SIMIT started the research on superconductivity since 2005. In the past 7 years, we have built up a research group about 30 researchers. The research fields include superconductor materials and physics, superconducting sensors and the applications.
In this talk, I will give a brief introduction on SIMIT and the group on superconductivity. For the professional part, I will present two parts. One is SQUID circuits and the applications; I will discuss the SQUID bootstrap circuits (SBC) developed by SIMIT together with Juelich Research Center. The other part is about superconducting nanowire single photon detection (SNSPD) and its applications on quantum communication. I will present the non-latching SNSPD working mechanism and the application in QKD experiments.

Ref:
1．G. F. Zhang et al, A SQUID gradiometer module with wire-wound pickup antenna and integrated voltage feedback circuit, Physica C 2012
http://www.sciencedirect.com/science/article/pii/S0921453412002110

2. Chandra M Natarajan et al, Superconducting nanowire single-photon detectors: physics and applications, Supercond. Sci. Technol. 25 (2012) 063001 (16pp) Review paper.
http://iopscience.iop.org/0953-2048/25/6/063001/

3. D. K. Liu et al, Non-latching nature of superconducting nanowire single photon detection, submitted to Optical Express.