We report simulations and experimental results on the incidence-angle dependence of the optical reflectivity of asymmetric dielectric–metal–dielectric planar structures. Transfer-matrix method and 2-D finite-element analysis revealed the presence of multiple resonances that were attributed to the surface plasmon (SP) polariton mode at the metal–dielectric interfaces and guided-wave polariton modes within the asymmetric dielectric–metal–dielectric waveguide. The number of guided-wave polariton resonances scale with the thickness of the dielectric guiding layer while the SP resonance remained essentially unaltered. These findings were validated through reflectivity measurements on sapphire–metal–polymer structures.
© 2009 IEEE
Stephen P. Frisbie, Ananth Krishnan, Xiaoyan Xu, Luis Grave de Peralta, Sergey A. Nikishin, Mark W. Holtz, and Ayrton A. Bernussi, "Optical Reflectivity of Asymmetric Dielectric–Metal–Dielectric Planar Structures," J. Lightwave Technol. 27, 2964-2969 (2009)