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Prober, D. E. |
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Title |
Superconducting terahertz mixer using a transition-edge microbolometer |
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1993 |
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Appl. Phys. Lett. |
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Appl. Phys. Lett. |
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62 |
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17 |
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2119-2121 |
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HEB mixer, NbN, TES |
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Recommended by Klapwijk |
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244 |
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Maas, S. |
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SIS mixers |
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1993 |
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Artech House |
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338-340 |
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Boston, MA |
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249 |
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Tonguz, O.K.; Hwang, B. |
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Noise performance of AFC loops in optical heterodyne receivers |
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1993 |
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Proc. Lasers and Electro-Optics Society Annual Meeting |
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Proc. LEOS |
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361-362 |
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optical mixing |
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San Jose, CA, USA |
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510 |
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Author |
Prober, D. E. |
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Title |
Superconducting terahertz mixer using a transition-edge microbolometer |
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Journal Article |
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1993 |
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Department of Applied Physics and Physics, Yale University, New Haven, Connecticut 06520-2157 |
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2119-2121 |
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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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RPLAB @ atomics90 @ |
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955 |
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Ekstrom, H.; Karasik, B.; Weikle, R.; Yngvesson, K. S.; Gol’tsman, G.; Kollberg, E.; Gershenzon, E. |
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Mixers using superconducting Nb films in the resistive state |
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1993 |
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23rd European Microwave Conf. |
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23rd European Microwave Conf. |
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787-789 |
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Keywords |
Nb HEB mixers |
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The mixing of 20 GHz radiation in a Nb superconducting film in the resistive state was studied. The experiment gave evidence of electron-heating to be the origin of the non-linear phenomenon. The requirements on the operation mode and on the film parameters in order to obtain small conversion losses or even gain are determined. Our measurements indicate a conversion loss of about 6-8 dB. The hot-electron bolometer is considered to be very promising for use in heterodyne receivers in a wide frequency range from microwaves to terahertz frequencies. |
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1651 |
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