Chinese Optics Letters, 2008, 6 (6): 434, Published Online: Jun. 10, 2008  

Coupling effect of surface plasmon polaritons in single-negative lamellar heterostructure

Author Affiliations
1 Department of Physics, Nanjing Xiaozhuang College, Nanjing 210017
2 National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093
Abstract
Propagation characteristics of surface plasmon polaritons (SPPs) in the lamellar heterostructure, which is actually a SPP waveguide array, constructed by two kinds of single negative (SNG) material layers stacked alternatively are investigated. Based on the finite element method (FEM), the negative-refraction (NR) property is demonstrated when the electromagnetic wave penetrates through free space into such SNG lamellar structure. A clear view of the underlying physics of NR is presented qualitatively that is mainly related to the coupled SPPs. The strong coupling effect leads to the novel SPP dispersion curves and then the anomalous propagation characteristics.

Xiaoxia Zhang, Wei Pan. Coupling effect of surface plasmon polaritons in single-negative lamellar heterostructure[J]. Chinese Optics Letters, 2008, 6(6): 434.

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