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Temperature dependence of the receiver noise temperature and if bandwidth of superconducting hot electron bolometer mixersстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Zhang W., Miao W., Zhong J.Q., Shi S.C., Hayton D.J., Vercruyssen N., Gao J.R., Goltsman G.N.
- Журнал: Superconductor Science and Technology
- Том: 27
- Номер: 085013
- Год издания: 2014
- Издательство: IOP Publishing
- Местоположение издательства: [Bristol, UK], England
- DOI: 10.1088/0953-2048/27/8/085013
- Аннотация: In this paper we study the temperature dependence of the receiver noise temperature and IF noise bandwidth of superconducting hot electron bolometer (HEB) mixers. Three superconducting NbN HEB devices of different transition temperatures (Tc) are measured at 0.85 THz and 1.4 THz at different bath temperatures (Tbath) between 4 K and 9 K. Measurement results demonstrate that the receiver noise temperature of superconducting NbN HEB devices is nearly constant for Tbath/Tc, less than 0.8, which is consistent with the simulation based on a distributed hot-spot model. In addition, the IF noise bandwidth appears independent of Tbath/ Tc, indicating the dominance of phonon cooling in the investigated HEB devices. © 2014 IOP Publishing Ltd.
- Добавил в систему: Гольцман Григорий Наумович