Excitation of Multiple Surface Plasmon-Polaritons by a Metal Layer Inserted in an Equichiral Sculptured Thin Film

excitation of multiple surface plasmon-polaritons (spps) by an equichiral sculptured thin film with a metal layer defect was studied theoretically in the sarid configuration, using the transfer matrix method. multiple spp modes were distinguished from waveguide modes in optical absorption for p-polarized plane wave. the degree of localization of multiple spp waves was investigated by calculation of the time-averaged poynting vector. the results showed that the long-range and short-range spp waves can simultaneously be excited at both interfaces of metal core in this proposed structure which may be used in a broad range of sensing applications.