The sine-Gordon equation for a Josephson coupled superconductor/insulator (S/I) superlattice is derived using a Lagrangian formalism. This equaition has essentially the same form as that given earlier by I. O Kulik (1965) for a single Josephson junction but with dfferent parameters. For the case of S/I (superconductor/insulator) superlattices alternately containing two different barrier thicknesses, the behavior of the propagation and generation of the Josephson radiation is governed by two coupled sine-Gordon equations, which results in two photon branches sepearted by a frequency gap. Some potential applications of these structures, involving increased outputs of the Josephson radiation and two band filters, are discussed.
|Original language||English (US)|
|Journal||IEEE Transactions on Magnetics|
|State||Published - Jan 1 1987|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering