Superconducting switches are important components in multiplexers based on superconducting quantum interference devices (SQUIDs). In time-division multiplexing (TDM) circuits, the superconducting switches are mainly used to activate and control input SQUIDs. The superconducting switch has the advantages of low power consumption and easy control. Here, a superconducting switch based on weakly damped SQUIDs is proposed. The dynamic resistance of the superconducting switch can be increased by appropriately adjusting the Stewart-McCumber parameter $\beta _{c}$ of the Josephson junction. This design is expected to reduce the number of SQUIDs in arrays and simplify the fabrication processes of switches.Superconducting switches are important components in multiplexers based on superconducting quantum interference devices (SQUIDs). In time-division multiplexing (TDM) circuits, the superconducting switches are mainly used to activate and control input SQUIDs. The superconducting switch has the advantages of low power consumption and easy control. Here, a superconducting switch based on weakly damped SQUIDs is proposed. The dynamic resistance of the superconducting switch can be increased by appropriately adjusting the Stewart-McCumber parameter $\beta _{c}$ of the Josephson junction. This design is expected to reduce the number of SQUIDs in arrays and simplify the fabrication processes of switches.

China Semiconductor Technology International Conference (CSTIC)Jun 26, 20230 citations

Superconductivity

David S. Simon

Undergraduate texts in physicsJan 1, 20250 citations

Double superconductivity

David Abergel

Nature PhysicsOct 1, 20210 citations

Experimental investigation of a 220 GHz planar multiple bridges superconducting switch

Boon-Kok Tan, G. Yassin, Ernst Otto +1 more

We present preliminary measured responses of a planar superconducting on/off switch centred at the 220 GHz. The superconducting switch, comprising three niobium nitride (NbN) bridges, deposited across the slotline section of a back-to-back unilateral linline, made of a similar superconducting material. The transmission characteristics of the superconducting switch illuminated by a sub-millimetre source were measured using a superconductor-insulator-superconductor (SIS) chip as direct detector. The NbN bridges were switched from the super-conducting state to the normal state by a bias current exceeding the critical current of the bridges. With this arrangement, we have measured a switching dynamic range of ∼ 13 dB at 245 GHz, demonstrating the successful operation of the multiple NbN bridges planar superconducting on/off switch.We present preliminary measured responses of a planar superconducting on/off switch centred at the 220 GHz. The superconducting switch, comprising three niobium nitride (NbN) bridges, deposited across the slotline section of a back-to-back unilateral linline, made of a similar superconducting material. The transmission characteristics of the superconducting switch illuminated by a sub-millimetre source were measured using a superconductor-insulator-superconductor (SIS) chip as direct detector. The NbN bridges were switched from the super-conducting state to the normal state by a bias current exceeding the critical current of the bridges. With this arrangement, we have measured a switching dynamic range of ∼ 13 dB at 245 GHz, demonstrating the successful operation of the multiple NbN bridges planar superconducting on/off switch.

UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT)Sep 1, 20151 citation

New Trends in Superconductivity

James F. Annett, S. P. Kruchinin

Springer eBooksJan 1, 200240 citations

Experimental Investigation of a Superconducting Switch at Millimeter Wavelengths

Boon-Kok Tan, G. Yassin, Ernst Otto +1 more

We present preliminary measured responses of a planar superconducting on/off switch operating at millimeter wavelengths. The superconducting switch, comprising three niobium nitride (NbN) bridges, is deposited across the slotline section of a back-to-back unilateral finline. The transmission characteristics of the superconducting switch illuminated by a millimeter source was measured using a superconductor-insulator-superconductor (SIS) tunnel junction as direct detector. The NbN bridges were switched from the superconducting state to the normal state by passing current through the bridges with magnitude that exceeds its critical current value. With this arrangement, we have measured a typical switching dynamic range of approximately 10 dB across the 205-240 GHz band, with the highest dynamic range of ~ 20 dB at 230 GHz. This demonstrated the successful operation of the multiple NbN bridges as a planar superconducting on/off switch.We present preliminary measured responses of a planar superconducting on/off switch operating at millimeter wavelengths. The superconducting switch, comprising three niobium nitride (NbN) bridges, is deposited across the slotline section of a back-to-back unilateral finline. The transmission characteristics of the superconducting switch illuminated by a millimeter source was measured using a superconductor-insulator-superconductor (SIS) tunnel junction as direct detector. The NbN bridges were switched from the superconducting state to the normal state by passing current through the bridges with magnitude that exceeds its critical current value. With this arrangement, we have measured a typical switching dynamic range of approximately 10 dB across the 205-240 GHz band, with the highest dynamic range of ~ 20 dB at 230 GHz. This demonstrated the successful operation of the multiple NbN bridges as a planar superconducting on/off switch.

IEEE Transactions on Terahertz Science and TechnologyDec 1, 20152 citations

\beta _{c}

of the Josephson junction. This design is expected to reduce the number of SQUIDs in arrays and simplify the fabrication processes of switches.