A 0.2–0.5 THz single-band heterodyne receiver based on a photonic local oscillator and a superconductor-insulator-superconductor mixer

Kohjiro, Satoshi; Kikuchi, Kenichi; Maezawa, Masaaki; Furuta, Tomofumi; Wakatsuki, Atsushi; Ito, Hiroshi; Shimizu, Naofumi; Nagatsuma, Tadao; Kado, Yuichi
September 2008
Applied Physics Letters;9/1/2008, Vol. 93 Issue 9, p093508
Academic Journal
We have demonstrated that a superconductor-insulator-superconductor (SIS) mixer pumped by a photonic local oscillator (LO) covers the whole frequency range of 0.2–0.5 THz. In the bandwidth of 74% of the center frequency, this single-band receiver exhibits noise temperature of TRX<=20hf/kB, where h is Planck’s constant, f is the frequency, and kB is Boltzmann’s constant. Resultant TRX is almost equal to TRX of the identical SIS mixer pumped by three conventional frequency-multiplier-based LOs which share the 0.2–0.5 THz band. This technique will contribute to simple, wide-band, and low-noise heterodyne receivers in the terahertz region.


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