Journal
APPLIED PHYSICS LETTERS
Volume 88, Issue 5, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2170426
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We show that the emission of light from a dye layer through an adjacent thin silver film is maximal for a silver thickness of approximately 50 nm. This effect is explained as the result of competition between enhancement of the electric field at the metal surface due to the excitation of a surface plasmon-polariton mode, the amount of power coupled to the surface plasmon-polariton mode, and the attenuation of the field transmitted through the silver, all three of which vary with metal thickness. We indicate how these findings may be of relevance in the design of some surface plasmon-polariton-based fluorescence biosensing schemes. (c) 2006 American Institute of Physics.
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