Title :
Fabrication and Characterization of Superconducting NbN Nanowire Single Photon Detectors
Author :
Stern, Jeffrey A. ; Farr, William H.
Author_Institution :
Jet Propulsion Lab., Pasadena
fDate :
6/1/2007 12:00:00 AM
Abstract :
We report on the fabrication and characterization of high-speed, single photon detectors using superconducting NbN nanowires at a wavelength of 1064 nm. A 15 by 15 microns detector with a detector efficiency of 40% has been measured. Due to kinetic inductance, the recovery time of such large area detectors is longer than that of smaller or single wire detectors. The recovery time of our detectors (50 ns) has been characterized by measuring the inter-arrival time statistics of our detector.
Keywords :
nanowires; niobium compounds; optical fabrication; superconducting device testing; superconducting materials; superconducting photodetectors; superconducting thin films; NbN - Interface; detector efficiency; inter-arrival time statistics measurement; kinetic inductance; recovery time; single photon detector fabrication; size 15 micron; superconducting NbN nanowire; wavelength 1064 nm; Critical current; Detectors; Fabrication; Kinetic theory; Radio frequency; Substrates; Superconducting filaments and wires; Superconducting films; Superconducting photodetectors; Wavelength measurement; NbN; SNSPD; single photon detector;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2007.898060
