MODEL OF THE BRAGG DIFFRACTION OF SURFACE PLASMON-POLARITONS BY AN ULTRASONIC BEAM PROPAGATING ALONG THE INTERFACE OF MEDIA
P.A. Nikitin
Scientific and Technological Centre of Unique Instrumentation, Russian Academy of Sciences, Moscow, Russia
Keywords: diffraction, surface plasmon polariton, ultrasound
Abstract
The paper presents an approach to controlling surface plasmon polaritons (SPP) by diffraction on acoustic waves. The Bragg diffraction of the SPP on an ultrasonic beam directed along the interface between media, one being an isotropic dielectric, is considered. It is shown that, in addition to the formation of SPP beams of zero and first diffraction orders, the SPP will also be converted into bulk radiation. Formulas for the intensities of SPP beams of zero and first diffraction orders for the main diffraction modes are derived. The proposed method can be used in the development of modern information processing devices, as well as devices for non-destructive testing of the homogeneity of dielectric coatings on metal surfaces.
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