PT Journal
AU Schubert, J
   Semenov, A
   Gol'tsman, G
   Hübers, H
   Schwaab, G
   Voronov, B
   Gershenzon, E
TI Noise temperature of an NbN hot-electron bolometric mixer at frequencies from 0.7 THz to 5.2 THz
SO Supercond. Sci. Technol.
PY 1999
BP 748
EP 750
VL 12
IS 11
DI 10.1088/0953-2048/12/11/317
DE NbN HEB mixers
AB We report on noise temperature measurements of an NbN phonon-cooled hot-electron bolometric mixer in the terahertz frequency range. The devices were 3 nm thick films with in-plane dimensions 1.7 × 0.2 µm2 and 0.9 × 0.2 µm2 integrated in a complementary logarithmic-spiral antenna. Measurements were performed at seven frequencies ranging from 0.7 THz to 5.2 THz. The measured DSB noise temperatures are 1500 K (0.7 THz), 2200 K (1.4 THz), 2600 K (1.6 THz), 2900 K (2.5 THz), 4000 K (3.1 THz), 5600 K (4.3 THz) and 8800 K (5.2 THz).
ER