Plasmon excitations in Josephson arrays and thin superconducting layers
Todor Mishonov, Atanas Groshev
DOI 10.1103/PhysRevLett.64.2199 · Physical Review Letters
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Abstract
Long-wave excitations in Josephson arrays are investigated. The existence of excitations with square root or acoustic dispersion law, like plasmons in two-dimensional electron gas, is predicted. Observation of such excitations with frequency much lower than the frequency of the superconducting gap Δ/ħ is possible by use of a grating and the same far infrared or microwave techniques used for detection of the plasmons in semiconductor microstructures.
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