Terahertz oscillation in submicron sized intrinsic Josephson junctions.

Authors :: Wang, H. B.
Urayama, S.
Kim, S. M.
Arisawa, S.
Hatano, T.
Zhu, B. Y.
Source :: Applied Physics Letters. 12/18/2006, Vol. 89 Issue 25, p252506. 3p. 1 Black and White Photograph, 2 Graphs.
Publication Year :: 2006
Abstract: Intrinsic Josephson junctions (IJJs) with lateral sizes down to submicron have been fabricated in high temperature cuprate superconductor Bi2Sr2CaCu2O8+δ single crystals. With in-plane magnetic fields applied perpendicular to the short edges, equally spaced current steps with intervals up to millivolts have been observed in current-voltage characteristics, indicating that terahertz oscillation has been excited in the junctions. The one-by-one switching to the same resonance frequency will make possible to employ a submicron sized IJJs stack as a building block for solid state terahertz continuous wave sources. [ABSTRACT FROM AUTHOR]