Surface plasmon converging and diverging properties modulated by polymer refractive structures on metal films

• DOI: 10.1364/oe.17.011315
• Publication Date: 2009-06-22T19:10:01Z
• Authors: D. G. Zhang; X.-C. L. Yuan; J. Bu; G. H. Yuan; Q. Wang; J. Lin; X. J. Zhang; P. Wang; H. Ming; T. Mei
• Keywords: Optics and Photonics; Photons; Metals; Polymers; Polymethyl Methacrylate; Scattering, Radiation; Equipment Design; 02 engineering and technology; Surface Plasmon Resonance; 0210 nano-technology

Polymer refractive microstructures are fabricated on metallic thin films and employed to modulate surface plasmons (SPs) propagations in a refractive manner. SP waves converging with different focal lengths and diverging effects are realized by the refractive structures. Authors investigated the modulation effect on SP waves as a function of different thicknesses and different shapes of the polymer micro-structures based on the effective refractive index model, where imaging properties of the SPs are observed experimentally by detecting the leaky radiation intensity of the SPs.