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Surface plasmon-polaritons in a multilayer structure consisting of a metallicfilm and one or more layers of nanocrystal (NC) quantum dots (QDs) are studied.It is shown that there is resonance coupling between the plasmon-polaritonspropagating along the metal/NC-layer interface and excitons confined in thedots, which makes a considerable effect on the optical properties of thestructure unless the dispersion of the QD size is too large. This coupling canbe explored in order to selectively excite QDs of different size by using anattenuated total reflection (ATR) structure. It opens the possibility ofcontrol of the relative intensity of light of different color, emitted by theQDs of different size.

ATR excitation of surface polaritons at the interface between a metal and a layer of nanocrystal quantum dots