PT Journal
AU Gousev, YP
   Gol'tsman, GN
   Semenov, AD
   Gershenzon, EM
   Nebosis, RS
   Heusinger, MA
   Renk, KF
TI Broadband ultrafast superconducting NbN detector for electromagnetic radiation
SO J. Appl. Phys.
JI J. Appl. Phys.
PY 1994
BP 3695
EP 3697
VL 75
IS 7
DI 10.1063/1.356060
DE NbN HEB
AB An ultrafast detector that is sensitive to radiation in a broad spectral range from submillimeter waves to visible light is reported. It consists of a structured NbN thin film cooled to a temperature below Tc (∼11 K). Using 20 ps pulses of a GaAs laser, we observed signal pulses with both rise and decay time of about 50 ps. From the analysis of a mixing experiment with submillimeter radiation we estimate an intrinsic response time of the detector of ∼12 ps. The sensitivity was found to be similar for the near‐infrared and submillimeter radiation. Broadband sensitivity and short response time are attributed to a quasiparticle heating effect.
ER