Self-Mixing Spectra of Terahertz Emitters Based on Bi2Sr2CaCu2O8+δ Intrinsic Josephson-Junction Stacks

2017 ◽  
Vol 8 (5) ◽  
Author(s):  
Ya Huang ◽  
Hancong Sun ◽  
Deyue An ◽  
Xianjing Zhou ◽  
Min Ji ◽  
...  
Keyword(s):  
Josephson Junction ◽  
Intrinsic Josephson Junction ◽  
Terahertz Emitters

scholarly journals Study of Radiation Characteristics of Intrinsic Josephson Junction Terahertz Emitters with Different Thickness of Bi2Sr2CaCu2O8+δ Crystals

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1135
Author(s):  
Takanari Kashiwagi ◽  
Takumi Yuasa ◽  
Genki Kuwano ◽  
Takashi Yamamoto ◽  
Manabu Tsujimoto ◽  
...  
Keyword(s):  
Josephson Junction ◽  
Radiation Intensity ◽  
Josephson Junctions ◽  
Heat Removal ◽  
Bath Temperature ◽  
Radiation Characteristics ◽  
Intrinsic Josephson Junctions ◽  
Intrinsic Josephson Junction ◽  
Terahertz Emitters ◽  
The Difference

The radiation intensity from the intrinsic Josephson junction high-Tc superconductor Bi2Sr2CaCu2O8+δ terahertz emitters (Bi2212-THz emitters) is one of the most important characteristics for application uses of the device. In principle, it would be expected to be improved with increasing the number of intrinsic Josephson junctions N in the emitters. In order to further improve the device characteristics, we have developed a stand alone type of mesa structures (SAMs) of Bi2212 crystals. Here, we understood the radiation characteristics of our SAMs more deeply, after we studied the radiation characteristics from three SAMs (S1, S2, and S3) with different thicknesses. Comparing radiation characteristics of the SAMs in which the number of intrinsic Josephson junctions are N∼ 1300 (S1), 2300 (S2), and 3100 (S3), respectively, the radiation intensity, frequency as well as the characteristics of the device working bath temperature are well understood. The strongest radiation of the order of few tens of microwatt was observed from the thickest SAM of S3. We discussed this feature through the N2-relationship and the radiation efficiency of a patch antenna. The thinner SAM of S1 can generate higher radiation frequencies than the thicker one of S3 due to the difference of the applied voltage per junctions limited by the heat-removal performance of the device structures. The observed features in this study are worthwhile designing Bi2212-THz emitters with better emission characteristics for many applications.

scholarly journals Spectral measurements of THz radiation emitted from intrinsic Josephson junction stacks

2018 ◽  
Vol 195 ◽  
pp. 05013
Author(s):  
V.P. Koshelets ◽  
N.V. Kinev ◽  
A.B. Ermakov ◽  
F. Rudau ◽  
R. Wieland ◽  
...  
Keyword(s):  
Josephson Junction ◽  
Thz Radiation ◽  
Spectral Measurements ◽  
Intrinsic Josephson Junction

Fluxons in long and annular intrinsic Josephson junction stacks

2002 ◽  
Vol 15 (12) ◽  
pp. 1651-1657 ◽  
Author(s):  
T Clauss ◽  
V Oehmichen ◽  
M M  le ◽  
A M ller ◽  
A Weber ◽  
...  
Keyword(s):  
Josephson Junction ◽  
Intrinsic Josephson Junction

A high- Tc intrinsic Josephson junction emitter tunable from 0.5 to 2.4 terahertz

2015 ◽  
Vol 107 (8) ◽  
pp. 082601 ◽  
Author(s):  
Takanari Kashiwagi ◽  
Kazuki Sakamoto ◽  
Hiroyuki Kubo ◽  
Yuuki Shibano ◽  
Takuma Enomoto ◽  
...  
Keyword(s):  
Josephson Junction ◽  
High Tc ◽  
Intrinsic Josephson Junction
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