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@ARTICLE{Gundareva:860953,
author = {Gundareva, Irina and Pavlovskiy, Valery and Divin, Yuriy},
title = {{H}igh-{T}c {J}osephson {J}unctions as {Q}uasiclassical
{TH}z {D}etectors},
journal = {IEEE transactions on applied superconductivity},
volume = {28},
number = {4},
issn = {1558-2515},
address = {New York, NY},
publisher = {IEEE},
reportid = {FZJ-2019-01594},
pages = {1 - 5},
year = {2018},
abstract = {[100]-tilt YBa 2 Cu 3 O 7-x bicrystal Josephson junctions
(JJs) with resistances R n = (50-500) Ω and characteristic
voltages I c R n (50 K) of 2.5 mV have been fabricated and
their potential as classical terahertz detectors has been
evaluated. The dc I-V curves of the JJs at temperatures T
above 40 K have been found free of hysteresis and
demonstrated high nonlinearity with the second derivatives d
2 V/dI 2 up to 10 7 -10 8 Ω/A at T = 50 K. The response
ΔV(I) at the current I corresponding to the maximum of d 2
V/dI 2 has been observed in a power range of more than four
orders of magnitude, and ΔV is directly proportional to the
incident power P (square-law detection) at low power, then
ΔV ~ P 1/2 (linear detection) at higher power. The
responses ΔV(V) at low voltages V to external radiation
with the frequencies from 0.05 to 3 THz have been
experimentally found to be proportional to d 2 V/dI 2
(classical detection) at low frequencies and to dV/dI
(Josephson detection) at high frequencies with a crossover
near the low-frequency limit f l = (0.9 ± 0.3) THz of the
ac Josephson effect in our JJs. Numerical simulations of
such quasiclassical detector with R n = 300 Ω at T = 50 K
predict the NEP-values of 5·10 -15 W/Hz 1/2 at the
frequencies up to 1 THz.},
cin = {PGI-5},
ddc = {620},
cid = {I:(DE-Juel1)PGI-5-20110106},
pnm = {144 - Controlling Collective States (POF3-144)},
pid = {G:(DE-HGF)POF3-144},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000430727200001},
doi = {10.1109/TASC.2018.2822800},
url = {https://juser.fz-juelich.de/record/860953},
}