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Integrating superconductive and optical circuits
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View: Figures


Image of FIG. 1.
FIG. 1.

Schematic (a) top view and section (b) cross, both not to scale, showing the final result of our fabrication process. We first define the trilayer structure (see top view) with relative tunnel junctions (black-filled areas) then we deposited above the trilayer the sol-gel layer whose geometry is defined by protective resist and ion milling (the patterned areas are indicated by the arrows). The light is brought to the junctions by the channel waveguide collecting the signal from the optical fiber.

Image of FIG. 2.
FIG. 2.

(a) SEM picture of one side junction with a channel waveguide coupled to it; the inset is a SEM image (top view) showing the good lateral definition of a wide waveguide. (b) Typical features of the process of characterization of the optical losses for our channel waveguides. In the uppermost picture, we see the light transmission while in the plot we have the dependence of the intensity along a channel waveguide.

Image of FIG. 3.
FIG. 3.

(a) Light on (top)—light off (bottom) picture of a portion of subgap curve of the current-voltage characteristic of a Josephson junction. The inset shows the current-voltage characteristic of the junction (horizontal , vertical . (b) Dependencies of the voltage shifts generated by light irradiation for different values of the dc bias current. All the data in this figure were obtained at .


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Integrating superconductive and optical circuits