The nonlocal optical response of a layered high-temperature superconductor slab embedded in a dielectric medium is theoretically studied. It is assumed that the layers inside the high-temperature superconductor are parallel to the slab surfaces. We calculate its p-polarization optical spectra by using an average permittivity tensor which depends on both the frequency and the wave vector of the electromagnetic wave. Consequently, additional electromagnetic modes just above the characteristic Josephson plasma frequency, being in the terahertz range, are generated. It is shown that the p-polarization reflectivity spectra for a Bi2Sr2CaCu2O8 + δ (Bi2212) superconductor slab, embedded in high refractive index dielectric, exhibit prominent dips breaking the total internal reflection. For very small superconductor slab thicknesses, the optical spectra resonances are associated with Fabry-Perot resonances of the short-wavelength electromagnetic modes. In contrast, the long-wavelength electromagnetic modes, having...

中文翻译：

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约瑟夫森等离子体波在嵌入高折射率电介质中的分层高温超导体板中的激发

理论上研究了嵌入电介质中的层状高温超导体板的非局域光学响应。假设高温超导体内部的层与板坯表面平行。我们通过使用取决于电磁波的频率和波矢的平均介电常数张量来计算其 p 偏振光谱。因此，会产生刚好高于特征约瑟夫森等离子体频率（在太赫兹范围内）的额外电磁模式。结果表明，嵌入高折射率电介质中的 Bi2Sr2CaCu2O8 + δ (Bi2212) 超导体板的 p 偏振反射光谱表现出明显的下降，破坏了全内反射。对于非常小的超导体板厚度，光谱共振与短波长电磁模式的法布里-珀罗共振有关。相比之下，长波长电磁模式，具有...