Tunable compact on-chip superconducting switch

doi:10.1103/PhysRevApplied.21.024059

2024-02-29

DOI：10.1103/PhysRevApplied.21.024059

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We develop a compact four -port superconducting switch with tunable operating frequency in the range from 4.8 to 7.3 GHz. Isolation between channels exceeds 20 dB over a bandwidth of several hundred megahertz, exceeding 40 dB at some frequencies. The footprint of the device is 80 x 420 mu m2. The tunability requires only a global flux bias without either permanent magnets or microelectromechanical structures. As the switch is superconducting, the heat dissipation during operation is negligible. The device can operate at up to -80 dBm, which corresponds to 2.5 x 106 photons per microsecond at a frequency of 6 GHz. The device shows the possibility to be operated as a beam splitter with tunable splitting ratio.

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Physical Review Applied

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4.4

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7.1K

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2.8W

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moscow institute of physics & technology

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skolkovo institute of science & technology

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3.3K

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moscow state university of education

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212

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