Noise and Bandwidth of 0.5-THz Twin Vertically Stacked SIS Junctions

被引：1

作者：

Li, Jing ^{[1
]}

Shi, Sheng-Cai ^{[1
]}

Liu, Dong ^{[1
]}

Zhou, Kang-Ming ^{[1
]}

Wang, MingJye ^{[2
]}

Chen, Tse-Jun ^{[2
]}

Chen, Chong-Wen ^{[2
]}

Lu, Wei-Chun ^{[2
]}

Chiu, ChuangPing ^{[2
]}

Chang, Hsian-Hong ^{[2
]}

机构：

[1] Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China

[2] Acad Sinica, Inst Astron & Astrophys, Taipei 10617, Taiwan

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2011年 / 21卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Mixer noise; SIS devices (superconductor); submillimeter wave mixers; superconducting integrated circuit;

D O I：

10.1109/TASC.2010.2096493

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Twin SIS (superconductor-insulator-superconductor) junctions, with a simple structure, yet large bandwidth and low noise temperature, have been widely used in millimeter- and submillimeter-wave heterodyne mixers. With increasing frequency, however, the length of the tuning inductance connecting the two individual SIS junctions becomes short while the junction area remains fixed. With a relatively short tuning inductance, the effect of the junction's spreading inductance becomes non-negligible, and device fabrication becomes more difficult. By adopting vertically stacked SIS junctions (VSJs), which have an equivalent geometric capacitance inversely proportional to the junction number, it becomes feasible to increase the junction tuning inductance. In this paper, we report on the design, fabrication, and characterization of twin Nb/Al-AlOx/Nb/Al-AlOx/Nb VSJs for the 500-GHz frequency band.

引用

页码：663 / 666

页数：4

共 7 条

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IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 2007, 17 (02) : 343 - 346
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