PT Unknown
AU Seliverstov, SV
   Rusova, AA
   Kaurova, NS
   Voronov, BM
   Goltsman, GN
TI Attojoule energy resolution of direct detector based on hot electron bolometer
SE J. Phys.: Conf. Ser.
PY 2016
BP 012165 (1 to 5)
VL 741
DI 10.1088/1742-6596/741/1/012165
DE NbN HEB detector
AB We characterize superconducting antenna-coupled NbN hot-electron bolometer (HEB) for direct detection of THz radiation operating at a temperature of 9.0 K. At signal frequency of 2.5 THz, the measured value of the optical noise equivalent power is 2.0×10-13 W-Hz-0.5. The estimated value of the energy resolution is about 1.5 aJ. This value was confirmed in the experiment with pulsed 1.55-μm laser employed as a radiation source. The directly measured detector energy resolution is 2 aJ. The obtained risetime of pulses from the detector is 130 ps. This value was determined by the properties of the RF line. These characteristics make our detector a device-of-choice for a number of practical applications associated with detection of short THz pulses.
ER