Title :
RF single electron transistor readout amplifiers for superconducting astronomical detectors of X-ray to sub-mm wavelengths
Author :
Stevenson, Thomas R. ; Aassime, Abdelhanin ; Delsing, Per ; Schoelkopf, Robert ; Segall, Ken ; Stahle, Carl M.
fDate :
3/1/2001 12:00:00 AM
Abstract :
We have made Radio-Frequency Single-Electron Transistors (RF-SETs) with large input gates, and tested performance and modes of operation with the goal of using such devices as on-chip amplifiers for a variety of high impedance cryogenic photodetectors. We achieved ≈100 kHz of closed-loop bandwidth for charge-locked-loop and transimpedance amplifier feedback configurations, and have combined amplifier outputs using a form of wavelength division multiplexing. With our choice of SET junction resistance, a 0.5 fF input gate capacitance gave a cotunneling-degraded charge noise of 1×10-4 e/√Hz, but a fairly low input voltage noise of 30 nV/√Hz
Keywords :
astronomical instruments; closed loop systems; feedback amplifiers; photodetectors; radiofrequency amplifiers; readout electronics; single electron transistors; superconducting transistors; wavelength division multiplexing; 100 kHz; RF single electron transistor; charge locked loop; charge noise; closed loop bandwidth; cryogenic photodetector; readout amplifier; superconducting astronomical detector; transimpedance amplifier feedback; tunneling; voltage noise; wavelength division multiplexing; Bandwidth; Cryogenics; Impedance; Operational amplifiers; Output feedback; Photodetectors; Radio frequency; Radiofrequency amplifiers; Single electron transistors; Testing;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
