PT Unknown
AU Huebers, H
   Schubert, J
   Semenov, A
   Gol’tsman, GN
   Voronov, BM
   Gershenzon, EM
   Schwaab, GW
TI NbN phonon-cooled hot-electron bolometer as a mixer for THz heterodyne receivers
SE Proc. SPIE
PY 1999
BP 410
EP 416
VL 3828
DI 10.1117/12.361065
DE NbN HEB mixers
AB 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 1.7 X 0.2 micrometers [super:2] integrated in a complementary logarithmic spiral antenna. The measured DSB receiver noise temperatures are 1500 K, 2200 K, 2600 K, 2900 K, 4000 K, 5600 K and 8800 K. 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.
ER