Abstract
A non-linear superconducting transmission line has been successfully employed in heterodyne detection of sub-millimeter waves. In our experiments an Nb/Al/AlOx/Nb tunnel junction, measuring 0.15×40 μm, with a critical current density of about 2500 A/cm2 is used as a distributed mixer element. We have demonstrated that quantum limited sensitivity can be achieved with this type of device. At 460 GHz, a Y-factor of 2.5 has been recorded, corresponding to a double-side-band receiver noise temperature of 80 K. The double-side-band conversion loss is about 1 dB and the mixer noise temperature is estimated to be 18(±10) K.
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Dates
Type | When |
---|---|
Created | 23 years ago (July 26, 2002, 9:40 a.m.) |
Deposited | 1 year, 6 months ago (Feb. 3, 2024, 4:32 a.m.) |
Indexed | 4 months, 2 weeks ago (April 3, 2025, 4:44 a.m.) |
Issued | 29 years, 11 months ago (Aug. 28, 1995) |
Published | 29 years, 11 months ago (Aug. 28, 1995) |
Published Print | 29 years, 11 months ago (Aug. 28, 1995) |
@article{Tong_1995, title={Quantum limited heterodyne detection in superconducting non-linear transmission lines at sub-millimeter wavelengths}, volume={67}, ISSN={1077-3118}, url={http://dx.doi.org/10.1063/1.114405}, DOI={10.1063/1.114405}, number={9}, journal={Applied Physics Letters}, publisher={AIP Publishing}, author={Tong, Cheuk-yu Edward and Blundell, Raymond and Bumble, Bruce and Stern, Jeffrey A. and LeDuc, Henry G.}, year={1995}, month=aug, pages={1304–1306} }