Figure 1: Whispering galleries and quantum devices.

Left:the concept of transferral of whispering modes along linear arrays of elliptical disks, that are patterned in close proximity, relies on a layout such as that shown schematically here. The plasmonic devices are the outer ellipses. Between the two lines of ellipses are two π-rings, each consisting of three normal Josephson junctions and one π-junction. Right: Two microdisks each have an elliptical cone structure (major and minor lengths of 40 and 27 μm, respectively) with 10° semi-angles from the base. They consist of an underlayer of silver and a top layer of titanium dioxide (each 0.5 μm thick). The disks are separated by 0.8 μm. Each notch runs the full height of a disk and is 0.1 μm deep and wide.