Nb-based superconducting tunnel junctions as submillimeter-wave direct detectors

被引：11

作者：

Ariyoshi, S ^{[1
]}

Matsuo, H

Otani, C

Sato, H

Shimizu, H

Matsunaga, T

Noguchi, T

机构：

[1] Grad Univ Adv Studies, Kanagawa 2400193, Japan

[2] Natl Astron Observ Japan, Ctr Adv Technol, Tokyo 1818588, Japan

[3] RIKEN, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan

[4] NAOJ, Nobeyama Radio Observ, Minamisa Ku, Nagano 3841305, Japan

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2003年 / 13卷 / 02期

关键词：

focal plane array; niobium tunnel junction; submillimeter-wave; superconducting direct detectors;

D O I：

10.1109/TASC.2003.814172

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：

Employing an anodization method into our fabrication process, we have successfully fabricated STJs with size of 4 mum in diameter, Josephson critical current density of 1000 A/cm(2), low leakage current of less than 10 pA at 0.3 K and high fabrication yield of more than 90 percent. These STJs were applied to fabricate submillimeter-wave direct detectors using 12 linearly distributed junctions, each circular junction having a current density of 600 A/cm(2) and size of 4 mum in diameter. Direct detection of submillimeter-waves was measured using a Fourier transform spectrometer, which shows a maximum sensitivity at 440 GHz and a fractional bandwidth of 10 percent.

引用

页码：1128 / 1131

页数：4

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