Abstract
Surface plasmon spectroscopy has been suggested as a tool for investigating perturbations on metallic surfaces.1 This technique has been applied to the study of thin dielectric films2 to characterize rough metal–air interfaces3 and as immunosensors.4 An important feature is that the dimension of the perturbation can be 3 orders of magnitude less than the wavelength of the probing radiation.
© 1986 Optical Society of America
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