Structural Symmetry of Two-dimensional Metallic Arrays: Implications for Surface Plasmon Excitations

Details Structural Symmetry of Two-dimensional Metallic Arrays: Implications for Surface Plasmon Excitations Structural Symmetry of Two-dimensional Metallic Arrays: Implications for Surface Plasmon Excitations

2009-02-18

arxiv.org/abs/0902.3262v1

Physics

Optics

Scientific paper

In recent years, there has been intensive investigation of surface plasmon polaritons (SPPs) in the science and engineering fields. Understanding the physics of surface plasmon excitation is essential to the manipulation of SPPs, and most existing studies focus on (-1,0)-type SPP excitation. In this article, we report our recent investigation of the (0,+/- 1)-type SPP excitation of a gold two-dimensional nano-cavity array using finite-difference time-domain methodology. Our particular focus is on the symmetry properties of (0,+/- 1)-SPPs excited by different polarizations of light. It is found that polarization has strong implications for the field distribution of the corresponding SPPs. As a result, the control of polarization may provide important insights into the manipulation of SPPs.

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