Title :
Direct Detection of THz Signals with an NbN Superconducting Tunnel Junction
Author :
Shen, Xiao-Fang ; Li, Jing ; Shi, Sheng-Cai
Author_Institution :
CAS, Nanjing
Abstract :
NbN superconducting tunnel junctions (STJ) have a gap frequency reaching 1.4 THz, although demonstrating relatively large leakage current over Nb ones. In this paper the direct-detection performance of an NbN/AlN/NbN STJ is investigated at 0.5 THz with the aid of a Fourier transform spectrometer.
Keywords :
Fourier transform spectrometers; aluminium compounds; leakage currents; niobium compounds; shot noise; submillimetre wave detectors; superconducting junction devices; superconductive tunnelling; Fourier transform spectrometer; NbN-AlN-NbN; THz signal detection; current response; frequency 0.5 THz; frequency 1.4 THz; gap frequency; leakage current; shot noise; signal-to-noise ratio; superconducting tunnel junction; Current measurement; Frequency; Josephson junctions; Leakage current; Noise measurement; Semiconductor device noise; Signal detection; Signal to noise ratio; Superconducting device noise; Voltage;
Conference_Titel :
Infrared Millimeter Waves and 14th International Conference on Teraherz Electronics, 2006. IRMMW-THz 2006. Joint 31st International Conference on
Conference_Location :
Shanghai
Print_ISBN :
1-4244-0400-2
Electronic_ISBN :
1-4244-0400-2
DOI :
10.1109/ICIMW.2006.368552
