We investigate in this paper the influence of the localized plasmon resonance of gold nano-island structure on the photoluminescence of the exciplex in the polymer blends. The experimental results show that when the particle plasmon resonance overlaps the photoluminescence spectrum of the exciplex,the corresponding emission intensity is enhanced significantly. Furthermore, alonger lifetime is observed with the exciplex emission. We propose that the localized electrical field induced by the particle plasmon resonance increaseds the exciton diffusion length and thus conduces to the formation of the exciplex in the phase separation interface.

Waveguided grating structures were fabricated using interference lithography. The angle resolved tuning properties of the resonant waveguide mode and its dependence on the grating parameters and on the polarization properties of the incident light were investigated. In particular, the influence of the grating period and waveguide thickness on the tuning rate of the resonance waveguide mode was charatcerized. Theoretical simulation showed good agreement with the experimental results, which is important for futher applications of the waveguided grating device in filters and sensors.