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Sensitivity of an NbN hot electron bolometer based heterodyne receiver at 4.3 THz

Authors:
P. Khosropanah, W.M. Laauwen, J.R. Gao, M. Hajenius, J.N. Hovenier, T.M. Klapwijk
Abstract:
We have characterized a heterodyne receiver based on an NbN hot electron bolometer integrated with spiral antenna as mixer and a CO2 pumped gas laser at 4.3 THz as local oscillator (LO). We succeeded in measuring the receiver output power, responding to the hot/cold load, as a function of bias voltage at optimum LO power. From the resulted receiver noise temperature versus the bias voltage, we found a DSB receiver noise temperature of 3500 K at a bath temperature of 4 K, which is a minimum average value. This is the highest sensitivity reported so far at frequencies above 4 THz.
Categories:
HEB Mixers
Year:
2007
Session:
6
Full-text:
Download a PDF of this paper.
Page Number(s):
190-192