A novel type of surface plasmon-polariton modes having the cylindrical symmetry in the plane interface of a metal film
bounded by dielectric slabs is investigated. Bessel- and Hankel- modifications of such modes are introduced and studied.
The possibility of excitation surface waves on the cylindrical surface also is analyzed. The dispersion equation for these
waves has been obtained and investigated.
The detailed theoretical and experimental investigations of the self-reconstruction of the structure of Bessel beams in various scattering media, including biological tissue, have been carried out. Also the self- reconstruction of Bessel beam after shadowing with single obstacle is studied. Using conical beams, the peculiarities of speckle contrast imaging of subsurface targets embedded into highly scattering media have been investigated.
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