Wideband frequency metrology using high temperature superconducting Josephson junctions

Author

Chen, Jian ; Kurigata, Yuhei ; Wang, Huabing ; Nakajima, Kensuke ; Yamashita, Tsutomu ; Wu, Peiheng

Author_Institution

Res. Inst. of Electr. Commun., Tohoku Univ., Sendai, Japan

Volume

13

Issue

2

fYear

2003

fDate

6/1/2003 12:00:00 AM

Firstpage

1143

Lastpage

1146

Abstract

We have studied the responses of high temperature superconducting (HTS) Josephson junctions to monochromatic and polychromatic electromagnetic irradiations from 50 GHz to 4.25 THz. The highest operating frequency and the maximum value of normalized response are shown to be proportional to the I_CR_N product of the junction, where I_C and R_N are the critical current and normal resistance of the junction, respectively. Using a junction with I_CR_N of 330 μV, direct detections of monochromatic irradiations from 76 GHz to 3.1 THz have been obtained, indicating that fast detectors can be realized to cover around 50 : 1 frequency band by operating only one junction at one temperature. Also reported are the superposition of polychromatic signals, as well as some possible applications of the system.

Keywords

critical current density (superconductivity); frequency measurement; high-temperature superconductors; millimetre wave measurement; submillimetre wave measurement; superconducting junction devices; 330 muV; 50 GHz to 4.25 THz; 76 GHz to 3.1 THz; critical current; high temperature superconducting Josephson junctions; monochromatic electromagnetic irradiations; normal resistance; normalized response; operating frequency; polychromatic electromagnetic irradiations; polychromatic signals; superposition; wideband frequency metrology; Detectors; Free electron lasers; Frequency; Gas lasers; High temperature superconductors; Josephson junctions; Metrology; Pump lasers; Superconducting microwave devices; Wideband;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2003.814176

Filename

1211808