טכניון מכון טכנולוגי לישראל
הטכניון מכון טכנולוגי לישראל - בית הספר ללימודי מוסמכים  
Ph.D Thesis
Ph.D StudentBachar Gil
SubjectSuperconducting Nanowire-Based Devices
DepartmentDepartment of Electrical Engineering
Supervisor Professor Eyal Buks
Full Thesis textFull thesis text - English Version


Abstract

We investigate devices integrating superconducting nanowires.

First, we embed a nanowire in a superconducting microwave resonator. We show that there is a region of operation in which self excited oscillations arise. We describe the fabrication of the devices from a high temperature superconductor (YBCO). A simple theoretical model, introduced in an earlier work, is used to explain the phenomena. We investigate this model theoretically and make new predictions, which are then demonstrated experimentally. We apply the self-modulation phenomenon to the amplification of electron spin resonance signals.

Next, we turn to investigate devices in which the nanowire is used for the detection of single photons. We introduce a novel configuration in which the nanowire is fabricated on the tip of an optical fiber and inside an optical cavity. We investigate the device theoretically, and show that it can be used to achieve high detection efficiency at high rates. We then discuss the fabrication steps and provide experimental results for single-photon detection.