Surface waves versus negative refractive index in layered superconductors

Details Surface waves versus negative refractive index in layered superconductors Surface waves versus negative refractive index in layered superconductors

2010-01-08

arxiv.org/abs/1001.1258v1

Phys. Rev. Lett. 104, 187003 (2010) [4 pages]

Physics

Condensed Matter

Superconductivity

4 figures

Scientific paper

We predict a new branch of surface Josephson plasma waves (SJPWs) in layered superconductors for frequencies higher than the Josephson plasma frequency. In this frequency range, the permittivity tensor components along and transverse to the layers have different signs, which is usually associated with negative refraction. However, for these frequencies, the bulk Josephson plasma waves cannot be matched with the incident and reflected waves in the vacuum, and, instead of the negative-refractive properties, abnormal surface modes appear within the frequency band expected for bulk modes. We also discuss the excitation of high-frequency SJPWs by means of the attenuated-total-reflection method.

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