Terahertz responses in NbN/AlN/NbN tunnel junctions

被引：1

作者：

Uzawa, Y ^{[1
]}

Wang, Z ^{[1
]}

Kawakami, A ^{[1
]}

Shi, SC ^{[1
]}

Noguchi, T ^{[1
]}

机构：

[1] NATL ASTRON OBSERV,NOBEYAMA RADIO OBSERV,NAGANO 38413,JAPAN

来源：

PHYSICA C | 1997年 / 282卷

关键词：

D O I：

10.1016/S0921-4534(97)01369-5

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report the response at terahertz frequencies of NbN/AlN/NbN tunnel junctions. Using quasi-optical coupling techniques and an optically pumped far-infrared laser, we have observed photon assisted steps below and above the gap voltage at 0.98 THz We have also observed a reduction of the gap voltage compared with the theoretical calculations. The receiver noise performances for the all-NbN SIS junctions were analyzed using Tucker's quantum theory of mixing. The results showed that DSB receiver noise temperatures of below 3 hv/K-B can be achieved by using our NbN junctions for frequencies up to 2 THz.

引用

页码：2549 / 2550

页数：2

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