Near orthogonal launch of SPR modes in Au films
  We report the excitation of a surface plasmon resonance (SPR) close to the orthogonal axis of a gold (Au) film on borosilicate glass. Direct spectroscopic measurement of SPR shifts using different liquids are made at ~5{\deg} incidence within a reflection spectrophotometer. Scattering of light that is able to penetrate across the film at the interfaces is the proposed mechanism by which coupling, and plasmon localization, is established. 
John Canning, Akib Karim, Nikki Tzoumis, Yanzhen Tan, Rodolfo Patyk,   Brant C. Gibson
physics.optics