单向电磁模在两种不同金属界面上的实现
Realization of One-Way Electromagnetic Modes at the Interface Between Two Dissimilar Metals
摘要：
本文计算了在平行于界面的外磁场B中，电磁波在两种不同Drude金属界面上传播时的色散关系。传播模式被束缚到界面并垂直于B传播。在某些频率范围内，波只能在一个方向上传播。这些单向模式的频率范围随着B的增加而增加。一组模式发生在中等频率，两种金属的较低和较高的等离子体频率之间。另一个发生在低得多的频率，在它们的低和高回旋频率之间。我们讨论了在实际材料中实现这种模式的可能方法，包括不同的超导体。
英文摘要：
We calculate the dispersion relations for electromagnetic waves propagating at the interface between two dissimilar Drude metals in an external magnetic field B parallel to the interface. The propagating modes are bound to the inteface and travel perpendicular to B. In certain frequency ranges, the waves can propagate in one direction only. The frequency range for these one-way modes increases with increasing B. One group of modes occurs at moderate frequencies, between the lower and upper plasma frequencies of the two metals. The other occurs at much lower frequencies, between their lower and upper cyclotron frequencies. We discuss possible ways to realize such modes in real materials, including dissimilar superconductors.
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