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Author | Prober, D. E. | ||||
Title | Superconducting terahertz mixer using a transition-edge microbolometer | Type | Journal Article | ||
Year | 1993 | Publication | Appl. Phys. Lett. | Abbreviated Journal | Appl. Phys. Lett. |
Volume | 62 | Issue | 17 | Pages | 2119-2121 |
Keywords | HEB mixer, NbN, TES | ||||
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Notes | Recommended by Klapwijk | Approved | no | ||
Call Number | Serial | 244 | |||
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Author | Prober, D. E. | ||||
Title | Superconducting terahertz mixer using a transition-edge microbolometer | Type | Journal Article | ||
Year | 1993 | Publication | Department of Applied Physics and Physics, Yale University, New Haven, Connecticut 06520-2157 | Abbreviated Journal | |
Volume | Issue | Pages | 2119-2121 | ||
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Abstract | We present a new device concept for a mixer element for THz frequencies. This uses a superconducting transition-edge microbridge biased at the center of its superconducting transition near 4.2 K. It is fed from an antenna or waveguide structure. Power from a local oscillator and a rf signal produce a temperature and resulting resistance variation at the difference frequency. The new aspect is the use of a very short bridge in which rapid ( < 0.1 ns) outdiffision of hot electrons occurs. This gives large intermediate frequency (if) response. The mixer offers ~4 GHz if bandwidth, z 80 Cl rf resistive impedance, good match to the if amplifier, and requires only l-20 nW of local oscillator power. The upper rf frequency is determined by antenna or waveguide properties. Predicted mixer conversion efficiency is l/8, and predicted double-sideband receiver noise temperatures are 260 and 90 K for transition widths of 0.1 and 0.5 T, respectively. | ||||
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Notes | Approved | no | |||
Call Number | RPLAB @ atomics90 @ | Serial | 955 | ||
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