31 July 1998 Superconductive hot-electron mixers for terahertz heterodyne receiver applications
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Abstract
We report on the development of quasioptical Nb hot-electron bolometer mixers for heterodyne receivers operating at 1 THz 3 THz. The devices have submicron in-plane sizes, thus exploiting diffusion as the electron cooling mechanism. Quasioptical mixer circuits have been developed with planar double-dipole or twin-slot antennas. The measured (DSB) receiver noise temperatures are 1670 K at 1.1 THz, with an estimated mixer noise temperature of approximately equals 1060 K, and 2750 K at 2.5 THz, with an estimated mixer noise temperature of approximately equals 900 K. The IF bandwidth is found to scale as the length-squared, and bandwidths as high as 8 GHz have been measured. These results demonstrate the low-noise, broadband operation of the diffusion-cooled bolometer mixer over a wide range of far-infrared wavelengths.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
William R. McGrath, William R. McGrath, Anders J. Skalare, Anders J. Skalare, Boris S. Karasik, Boris S. Karasik, Michael C. Gaidis, Michael C. Gaidis, Bruce Bumble, Bruce Bumble, Henry G. LeDuc, Henry G. LeDuc, P. J. Burke, P. J. Burke, R. Schoelkopf, R. Schoelkopf, D. E. Prober, D. E. Prober, } "Superconductive hot-electron mixers for terahertz heterodyne receiver applications", Proc. SPIE 3357, Advanced Technology MMW, Radio, and Terahertz Telescopes, (31 July 1998); doi: 10.1117/12.317341; https://doi.org/10.1117/12.317341
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