Abstract
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
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