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Self-imaging and caustics in two-dimensional surface plasmon optics

2007; Elsevier BV; Volume: 281; Issue: 8 Linguagem: Inglês

10.1016/j.optcom.2007.11.056

1873-0310

G. Martínez Niconoff, José A. Sánchez‐Gil, Héctor Hugo Sánchez, A. Perez Leija,

Photonic Crystals and Applications

We study theoretically the surface plasmon electromagnetic field in the plane of the interface along which it propagates. Arbitrary surface plasmon fields are expressed by a linear superposition of elementary surface plasmon modes, thus obtaining an expression for the in-plane components similar to the angular spectrum model, which establishes the formal foundations of a two-dimensional surface plasmon optics. From this representation, we obtain the general description for surface plasmon modes be having as in-plane diffraction free beams. These new modes with their corresponding phase parameters are used to study surface plasmon self-imaging phenomenon and the synthesis of surface plasmon singularity regions (caustics) of surface plasmon fields, proposing experimental means to observe both.