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
收藏
页码：2549 / 2550
页数：2
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