15 July 2010 NbN hot electron bolometer mixer at 5.3 THz
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Abstract
We report the sensitivity of a superconducting NbN hot electron bolometer mixer integrated with a tight spiral antenna at 5.3 THz. Using a measurement setup with black body calibration sources and a beam splitter in vacuo, and an antireflection coated Si lens, we obtained a double sideband receiver noise temperature of 1150 K, which is 4.5 times hν/kB (quantum limit). Our experimental results in combination with an antenna-to-bolometer coupling simulation suggest that HEB mixer can work well at least up to 6 THz, suitable for next generation of high-resolution spectroscopic of the neutral atomic oxygen (OI) line at 4.7 THz.
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W. Zhang, W. Zhang, J. R. Gao, J. R. Gao, P. Khosropanah, P. Khosropanah, T. Bansal, T. Bansal, T. M. Klapwijk, T. M. Klapwijk, W. Miao, W. Miao, S. C. Shi, S. C. Shi, } "NbN hot electron bolometer mixer at 5.3 THz", Proc. SPIE 7741, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V, 77411B (15 July 2010); doi: 10.1117/12.857683; https://doi.org/10.1117/12.857683
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