Supported by the National Natural Science Foundation of China under Grant Nos 10803021, 10621303, 10933005 and 10778602, the National Basic Research Program of China under Grant No 2010CB327401, and CAS Key Lab for Radio Astronomy.
We report the terahertz direct detection characteristics of a spiral antenna coupled NbN superconducting hot- electron bolometer (HEB) at a bath temperature of 4.2K. Thermal conductance determined from resistance tr...
Niobium is sputtered onto a single crystalline silicon substrate in N2:Ar=4:1 gas mixture at the total pressure of 2 Pa. The temperature coefficient of resistance of the sample is about 0.5% at 30OK, and up to 7% at...