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Silver plasmon resonance effects in AgPO3/silica photonic bandgap fiber.

We report on the application of an external electric field and its tuning effect in the guiding properties of a composite AgPO3/silica photonic bandgap fiber. The application of an electric field leads to the poling of the soft glass inclusion, resulting in the formation of a silver-induced plasmonic band, predominantly affecting the short wavelength guiding regimes while inducing polarization dependent losses. These spectral effects are attributed to the formation of silver nanoparticles within the AgPO3 glass matrix, driven by thermal poling.