Title :
Evaluation of terahertz emission from intrinsic josephson junctions using a high-Tc superconductor grain boundary Josephson junction
Author :
An, D.Y. ; Yuan, Jiaxin ; Kinev, N. ; Li, M.Y. ; Zhou, X.J. ; Ji, Mingming ; Huang, Yi-Pai ; Hatano, Tomomi ; Koshelets, V.P. ; Koelle, D. ; Kleiner, R. ; Xu, W.W. ; Wang, H.B. ; Wu, P.H.
Author_Institution :
Res. Inst. of Supercond. Electron., Nanjing Univ., Nanjing, China
Abstract :
To evaluate terahertz emission from intrinsic Josephson junctions, we use a YBa2Cu3O7 grain boundary Josephson junction as a detector. Shapiro steps on the current-voltage characteristics of the detector were clearly observed and their positions moved with the bias voltage of the emitter accordingly. Analyzing the current-voltage characteristics of the detector, we found that the emission was tuned over a wide frequency range, e.g., between 496.6 GHz and 540 GHz, at a temperature of 24 K.
Keywords :
Josephson effect; barium compounds; grain boundaries; high-temperature superconductors; terahertz wave spectra; yttrium compounds; Shapiro steps; YBa2Cu3O7; detector current-voltage characteristics; emitter bias voltage; frequency 496.6 GHz to 540 GHz; grain boundary Josephson junction; intrinsic Josephson junctions; temperature 24 K; terahertz emission evaluation; Bismuth compounds; Detectors; Grain boundaries; Josephson junctions; Junctions; Yttrium barium copper oxide;
Conference_Titel :
Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2013 38th International Conference on
Conference_Location :
Mainz
DOI :
10.1109/IRMMW-THz.2013.6665861
