Fig. 1: Integrated and DC-powered superconducting microcomb. | Nature Communications

Fig. 1: Integrated and DC-powered superconducting microcomb.

From: Integrated and DC-powered superconducting microcomb

Fig. 1

a Illustration of the device. Frequency comb emission is generated when a DC voltage-biased (Vdc) Josephson junction is coupled to a superconducting CPW resonator. b The power spectral density (top) and flowing supercurrent through the Josephson junction (bottom) as a function of DC bias voltage. c Frequency comb spectrum obtained at Vdc = 43 \({{{{{\rm{\mu }}}}}}{{{{{\rm{V}}}}}}\). d Extracted emission frequencies (open dots) from (c). The dashed line represents fitting to the comb formula \({f}_{m}=m{f}_{r}\).

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