PT Journal
AU Semenov, AD
   Gousev, YP
   Nebosis, RS
   Renk, KF
   Yagoubov, P
   Voronov, BM
   Gol’tsman, GN
   Syomash, VD
   Gershenzon, EM
TI Heterodyne detection of THz radiation with a superconducting hot‐electron bolometer mixer
SO Appl. Phys. Lett.
JI Appl. Phys. Lett.
PY 1996
BP 260
EP 262
VL 69
IS 2
DI 10.1063/1.117943
DE NbN HEB mixers
AB We report on the use of a superconducting hot‐electron bolometer mixer for heterodyne detection of terahertz radiation. Radiation with a wavelength of 119 μm was coupled to the mixer, a NbN microbridge, by a hybrid quasioptical antenna consisting of an extended hyperhemispherical lens and a planar logarithmic spiral antenna. We found, at an intermediate frequency of 1.5 GHz, a system double side band noise temperature of ≊40 000 K and conversion losses of 25 dB. We also discuss the possibilities of further improvement of the mixer performance.
ER