PT Journal
AU Semenov, AD
   Gol’tsman, GN
   Gogidze, IG
   Sergeev, AV
   Gershenzon, EM
   Lang, PT
   Renk, KF
TI Subnanosecond photoresponse of a YBaCuO thin film to infrared and visible radiation by quasiparticle induced suppression of superconductivity
SO Appl. Phys. Lett.
JI Appl. Phys. Lett.
PY 1992
BP 903
EP 905
VL 60
IS 7
DI 10.1063/1.106500
DE YBCO HTS detectors
AB We observed subnanosecond photoresponse of a structured superconducting YBa2Cu3O7−δ thin film to infrared and visible radiation. We measured the voltage response of a current biased film (thickness 700 Å) in a resistive state to radiation pulses. From our results we conclude a response time of about 90 ps and a responsivity of about 4×1010 Ω/J. We attribute the response to Cooper pair breaking and suppression of the superconducting energy gap induced by nonequilibrium quasiparticles.
ER