
146 Handbook of Biomedical Optics
then their diraction patterns would be uncorrelated for the two
wavelengths. Experimental validation of this alternative concept
is still pending. Subject to the successful implementation of this
idea to working experimental prototypes, this approach could
have a great number of applications in both color and SI regimes.
7.5.4 SE-SI Systems Based on Surface
Plasmons and Nanodevices
Surface plasmons are charge density waves formed on the sur-
face of materials with free electrons (metals). ese electromag-
netic (EM) waves are conned on conductor’s surface and are
propagating along the metal/dielectric (or