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Submillimeter wave generation using Josephson junction arrays

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3 Author(s)
Wan, K.-L. ; Dept. of Phys., State Univ. of New York, Stony Brook, NY, USA ; Jain, A.K. ; Lukens, J.E.

A submillimeter-wave oscillator using a phase-locked array of Josephson junctions is demonstrated. With an array of 40 shunted tunnel junctions, the oscillator delivers 1 μW of power at 350 GHz into a 60-Ω load on the chip. The operating frequency of the oscillator is tunable over a range of about 10%. Experiments on two coupled lead alloy tunnel junctions show that Josephson oscillations exist to about 1 THz. Using a similar design and a higher gap superconductor such as NbN for the transmission lines, arrays operating at 1 THz with power outputs of 1 mW should be feasible

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Magnetics, IEEE Transactions on  (Volume:25 ,  Issue: 2 )