Large bandwidth and low noise in a diffusion-cooled hot-electron bolometer mixer

被引：58

作者：

Skalare, A ^{[1
]}

McGrath, WR ^{[1
]}

Bumble, B ^{[1
]}

LeDuc, HG ^{[1
]}

Burke, PJ ^{[1
]}

Verheijen, AA ^{[1
]}

Schoelkopf, RJ ^{[1
]}

Prober, DE ^{[1
]}

机构：

[1] YALE UNIV,DEPT APPL PHYS,NEW HAVEN,CT 06520

来源：

APPLIED PHYSICS LETTERS | 1996年 / 68卷 / 11期

关键词：

D O I：

10.1063/1.115698

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Heterodyne measurements have been made at 533 GHz using a novel superconducting hot-electron bolometer in a waveguide mixer. The bolometer is a 0.3 mu m long niobium microbridge with a superconducting transition temperature of 5 K. The short length ensures that electron diffusion dominates over electron-phonon interactions as the electron cooling mechanism, which should allow heterodyne detection with intermediate frequencies (if) of several GHz. A Y-factor response of 1.15 dB has been obtained at an if of 1.4 GHz with 77 and 295 K loads, indicating a receiver noise temperature of 650 K DSB. The -3 dB rolloff in the if response occurs at 1.7 GHz. (C) 1996 American Institute of Physics.

引用

页码：1558 / 1560

页数：3

共 14 条

[1]

ARAMS F, 1966, P IEEE, V54, P308

[2] CONVERSION GAIN AND NOISE OF NIOBIUM SUPERCONDUCTING HOT-ELECTRON-MIXERS [J].