Anomalous dispersion of oblique terahertz waves localized in the plate of a layered superconductor
A theoretical study of localized waves propagating along a plate with finite thickness, made out of a layered superconductor with layers perpendicular to the surface of the plate. Due to the strong anisotropy of the layered superconductor, the electromagnetic field of the mode is a superposition of...
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Veröffentlicht in: | Low temperature physics (Woodbury, N.Y.) N.Y.), 2019-08, Vol.45 (8), p.885-893 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | A theoretical study of localized waves propagating along a plate with finite thickness,
made out of a layered superconductor with layers perpendicular to the surface of the
plate. Due to the strong anisotropy of the layered superconductor, the electromagnetic
field of the mode is a superposition of the ordinary and extraordinary waves that, in
general, cannot be separated from each other. The dispersion law for an arbitrary
direction of the propagation of such localized modes with respect to the layers is
derived. It is shown that the dispersion curves may increase in both a monotonic and
non-monotonic manner, i.e. they contain regions with anomalous
dispersion. The frequencies at which the anomalous dispersion may be observed are
determined as a function of the propagation angle. The dependence of the frequency on both
the modulus of the longitudinal wave vector and its projections is analyzed. The results
obtained may be of significant importance to practical applications in terahertz-range
electronics. |
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ISSN: | 1063-777X 1090-6517 |
DOI: | 10.1063/1.5116536 |