Superconducting-nanowire based electronics
Superconducting nanowire has been used as a platform for understanding superconductivity and developing advanced electronics. I will present the recent progresses I have done for extending the functionality of nanowire devices with my colleagues. Recently, we have found that a single nanowire can be thought of as a transmission line with signal velocity of only several percent of the speed of light. By combining this transmission line property with its single photon sensitivity, the nanowire can detect photons in a distributed fashion as a novel single-photon imager. Such transmission line effects in a superconducting nanowire also give a different scenario of hotspot growth and voltage output with taking into account microwave propagation. We also recently developed a three-terminal superconducting device called the nanocryotron (nTron). I will report the demonstration of a driving stage using a single nanowire cryotron (nTron) that can read SFQ pulses and then drive a high electron mobility transistor (HEMT). The use of nTron offers a flexible approach to interfacing SFQ circuits with non-superconducting electronics or construct a superconducting computer. To facilitate the development of nanowire devices and circuits, modeling approaches will also be discussed with our experimental observations.