Characterization of terahertz detectors based on niobium nitride superconducting tunnel junctions

Author

Zheng Wang ; Shao-Liang Li ; Dong Liu ; Jie Hu ; Jing Li ; Sheng-cai Shi

Author_Institution

Key Lab. of Radio Astron., Purple mountain Obs., Nanjing, China

fYear

2014

fDate

16-23 Aug. 2014

Firstpage

1

Lastpage

4

Abstract

Terahertz direct detectors based on superconducting tunnel junctions (STJs) have the merits of short response time, large dynamic range and relatively high operating temperature, providing a good choice for terahertz detection. Compared with commonly used niobium STJs, niobium nitride (NbN) ones have a high transition temperature close to 16K. Hence they might be useful for terahertz detection operating at temperatures well above the LHe temperature of 4.2K. In this paper, we investigate the properties of NbN STJ detectors at different bath temperatures. Detailed experiment results are given.

Keywords

niobium compounds; submillimetre wave detectors; superconducting junction devices; superconductive tunnelling; terahertz wave detectors; LHe temperature; NbN; STJ; high transition temperature; niobium nitride superconducting tunnel junction; temperature 4.2 K; terahertz direct detector characterization; Detectors; Josephson junctions; Junctions; Niobium; Temperature; Temperature measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

General Assembly and Scientific Symposium (URSI GASS), 2014 XXXIth URSI

Conference_Location

Beijing

Type

conf

DOI

10.1109/URSIGASS.2014.6930012

Filename

6930012