Surface plasmon-polaritons in multilayer nanostructures

DIPC Seminars

Mikhail Vasilevskiy , Center of Physics and Dertament of Physics, University of Minho, Braga, Portugal
Donostia International Physics Center, Paseo Manuel de Lardizabal 4, Donostia-San Sebastián
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Surface plasmon-polaritons in multilayer nanostructures Surface plasmon-polaritons (SPP) are evanescent electromagnetic (EM) waves induced by the coupling of the EM field to conduction electrons near the surface of a conductor. Its amplitude decays exponentially at both sides of the interface. SPP?s properties are determined by the frequency-dependent dielectric function of the conductor and the surrounding dielectric materials. In this talk, SPPs in two types of multilayer nanostructures will be considered: (i) monolayer grapheme sandwiched between two dielectrics, and (ii) metallic film combined with one or several layers of semiconductor nanocrystal quantum dots (QDs) produced by chemical synthesis and dispersed in a dielectric matrix. The possibilities of using SPPs for making optical switches and polarizers, in the case of (i), and for selective excitation of QD light emitters, in the case of (ii), will be discussed.