PT Journal
AU Gershenzon, EM
   Gershenzon, ME
   Goltsman, GN
   Semenov, AD
   Sergeev, AV
TI Wide-band highspeed Nb and YBaCuO detectors
SO IEEE Trans. Magn.
JI IEEE Trans. Magn.
PY 1991
BP 2836
EP 2839
VL 27
IS 2
DI 10.1109/20.133799
DE YBCO; HTS; Nb detectors
AB The physical limitations on the response time and the nature of nonequilibrium detection of radiation were investigated for Nb and YBCO film in a wide spectral range from millimeter to near-infrared wavelengths. In the case of ideal heat removal from the film, the detection mechanism is connected with an electron heating effect which is not selective over a wide spectral interval. For Nb, the dependence of the response time on the electron mean free path l and temperature T is tau varies as T/sup -2/l/sup -1/. The values of detectivity D* and tau are 3*10/sup 11/ W/sup -1/ Hz/sup 1/2/ cm and 5*10/sup -9/ s at T=1.6 K, respectively. For YBCO film the tau value of 1-2 ps at T=77 K was obtained; the NEP value of 3*10/sup -11/ W-Hz/sup -1/2/ can be obtained at T=77 K in the case of the optimal film matching to the radiation.
ER