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We investigate surface plasmon polaritons (SPPs) excited by electromagnetic waves at an interface of two media. In sharp contrast to the current understanding of SPPs, we found that when the excitation field is present, the tangential components of the electrical field and the magnetic field at the boundary cannot be simultaneously continuous for SPPs. Surface current and/or charge densities will...
We discuss the impact of possible non-zero surface current at the interface for negative index media where ε=-1 and μ=-1. For the interface between air (ε=1 and μ=1) and the NIM, the assumption of zero surface current may not always be correct and a non-zero surface current can resolve the otherwise self-contradictory boundary conditions. These new solutions for this type of NIM slab reveal that there...
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