Low noise NbN lattice-cooled superconducting hot-electron bolometric mixers at submillimeter wavelengths
作者:
Jonathan Kawamura,
Raymond Blundell,
Cheuk-yu Edward Tong,
Gregory Gol’tsman,
Eugene Gershenzon,
Boris Voronov,
Sergey Cherednichenko,
期刊:
Applied Physics Letters
(AIP Available online 1997)
卷期:
Volume 70,
issue 12
页码: 1619-1621
ISSN:0003-6951
年代: 1997
DOI:10.1063/1.118634
出版商: AIP
数据来源: AIP
摘要:
Lattice-cooled superconducting hot-electron bolometric mixers are used in a submillimeter-wave waveguide heterodyne receiver. The mixer elements are niobium nitride film with 3.5 nm thickness and∼10 &mgr;m2area. The local oscillator power for optimal performance is estimated to be 0.5&mgr;W, and the instantaneous bandwidth is 2.2 GHz. At an intermediate frequency centered at 1.4 GHz with 200 MHz bandwidth, the double sideband receiver noise temperature is 410 K at 430 GHz. The receiver has been used to detect molecular line emission in a laboratory gas cell. ©1997 American Institute of Physics.
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