NbN phonon-cooled hot-electron bolometer as a mixer for THz heterodyne receivers

被引：2

作者：

Hübers, HW ^{[1
]}

Schubert, J ^{[1
]}

Semenov, A ^{[1
]}

Gol'tsman, G ^{[1
]}

Voronov, B ^{[1
]}

Gershenzon, E ^{[1
]}

Schwaab, GW ^{[1
]}

机构：

[1] DLR, Inst Space Sensor Technol & Planetary Explorat, D-12484 Berlin, Germany

来源：

TERAHERTZ SPECTROSCOPY AND APPLICATIONS 11 | 1999年 / 3828卷

关键词：

hot-electron bolometer; NbN; superconductor; mixer; terahertz; spiral antenna;

D O I：

10.1117/12.361065

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：

We have investigated a phonon-cooled NbN hot electron bolometric (HEB) mixer in the frequency range from 0.7 THz to 5.2 THz. The device was a 3.5 nm thin film with an in-plane dimension of 1.7x0.2 mu m(2) integrated in a complementary logarithmic spiral antenna. The measured DSB receiver noise temperatures are 1500 K (0.7 THz), 2200 K (1.4 THz), 2600 K (1.6 THz), 2900 K (2.5 THz), 4000 K (3.1 THz), 5600 K (4.3 THz), and 8800 K (5.2 THz). The sensitivity fluctuation, the long term stability, and the antenna pattern were measured and the suitability of the mixer for a practical heterodyne receiver is discussed.

引用

页码：410 / 416

页数：7

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