TY  - JOUR
AU  - Khosropanah, P.
AU  - Gao, J. R.
AU  - Laauwen, W. M.
AU  - Hajenius, M.
AU  - Klapwijk, T. M.
PY  - 2007
DA  - 2007//
TI  - Low noise NbN hot electron bolometer mixer at 4.3  THz
T2  - Appl. Phys. Lett.
JO  - Appl. Phys. Lett.
SP  - 221111 (1 to 3)
VL  - 91
KW  - NbN HEB mixers
KW  - NbN
KW  - contacts cleaning
AB  - We have studied the sensitivity of a superconducting NbN hot electron bolometer mixer integrated with a spiral antenna at 4.3  THz. Using hot/cold blackbody loads and a beam splitter all in vacuum, we measured a double sideband receiver noise temperature of 1300  K at the optimum local oscillator (LO) power of 330  nW, which is about 12 times the quantum noise (hnu/2kB). Our result indicates that there is no sign of degradation of the mixing process at the superterahertz frequencies. Moreover, a measurement method is introduced which allows us for an accurate determination of the sensitivity despite LO power fluctuations.
N1  - exported from refbase (https://db.rplab.ru/refbase/show.php?record=584), last updated on Tue, 25 May 2021 21:54:12 -0500
ID  - Khosropanah_etal2007
ER  -