Broadband THz detection by high-Tc Josephson junctions

Detection of THz radiation by YBa
₂
Cu
₃
O
_7-x
Josephson bicrystal junctions with high characteristic voltages I
_c
R
_n
up to 8 mV has been studied. The high-resistance junctions have demonstrated a classical detection of radiation with frequencies up to terahertz range. It was shown by numerical simulations, that the values of noise equivalent power NEP < 5 times10
^-15
W/Hz
^1/2
can be reached at the frequencies up to 1.5 THz at junction temperature of 30 K.