A grain boundary Josephson junction as a mixer to evaluate terahertz emission from intrinsic Josephson junctions

Author

An, D.Y. ; Ji, Mingming ; Zhou, X.J. ; Huang, Yi-Pai ; Yu, Min-Chieh ; Zhang, M.Y. ; Hatano, Tomomi ; Kinev, N. ; Koshelets, V.P. ; Koelle, D. ; Kleiner, R. ; Chen, Jiann-Jong ; Xu, W.W. ; Wang, H.B. ; Wu, P.H.

Author_Institution

Res. Inst. of Supercond. Electron., Nanjing Univ., Nanjing, China

fYear

2014

fDate

14-19 Sept. 2014

Firstpage

1

Lastpage

2

Abstract

To evaluate terahertz emission from intrinsic Josephson junctions, we used a YBa₂Cu₃O_7-δ (YBCO) grain boundary Josephson junction as a terahertz detector. Shapiro steps have been clearly seen on the current-voltage curves of the YBCO junction irradiated with the emission from either a VDI-Tx-S140 transmitter (tens of μW at 620 GHz) or a Bi₂Sr₂CaCu₂O_8-x stack (25 μW at 500 GHz). While the harmonic mixing has been successfully performed with the VDI transmitter as the signal source, the evaluation of the intrinsic Josephson junctions is still undergoing.

Keywords

barium compounds; copper compounds; grain boundaries; superconducting junction devices; superconducting mixers; terahertz wave detectors; yttrium compounds; Shapiro steps; VDI-Tx-S140 transmitter; YBCO grain boundary Josephson junction; YBa₂Cu₃O_7-δ; current-voltage curves; frequency 500 GHz; frequency 620 GHz; harmonic mixing; intrinsic Josephson junctions; mixer; signal source; terahertz detector; terahertz emission evaluation; Bismuth compounds; Detectors; Grain boundaries; Josephson junctions; Junctions; Transmitters; Yttrium barium copper oxide;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2014 39th International Conference on

Conference_Location

Tucson, AZ

Type

conf

DOI

10.1109/IRMMW-THz.2014.6956529

Filename

6956529