Broad-band Fast Detection In Nb H.E.B.s

摘要

A range of cryogenically cooled devices are available (1) for detection of terahertz frequencies with good sensitivity. At liquid helium-4 temperature (4.2K) sub-pico Watt signal powers can be detected, but time resolution is limited to about 1 microsecond. We have designed, developed and tested a Niobium superconducting transition edge hot-electron bolometer (HEB) whichf combines picoWatt sensitivity over a very wide spectral range with nanosecond time resolution.