Physics – Condensed Matter – Superconductivity
Scientific paper
2001-10-11
Physics
Condensed Matter
Superconductivity
13 pages, including 4 figures
Scientific paper
10.1063/1.1456555
On a slice of Bi_2Sr_2CaCu_2O_{8+x} 200~300 nm thick, stacks of intrinsic Josephson junctions are patterned, connected to each other, and integrated with a bow-tie antenna and some chokes. Over an area of 150 microns by 170 microns, so far we are able to fabricate up to 256 stacks with over 11,000 junctions. Such 3-dimensional arrays of intrinsic Josephson junctions respond sensitively to irradiation at 760 GHz from a far-infrared laser, showing clear zero-crossing Shapiro steps up to 0.75 V. In addition, possible applications in quantum voltage standard etc are also discussed here. The high density of integration of Josephson junctions is also promising for many other applications.
Chen Jiahua
Maeda Kengo
Wang Hai-Bo
Wu Pei-Heng
Yamashita Toshifumi
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