Preparation and spectral characteristics of silver nano-sphere doped quartz micro-fiber

•A novel silver nano-sphere doped fiber configuration is prepared and studied.•Its spectral characteristic is studied in experiment and simulation.•Its spectral characteristic depends on the geometry parameters of configuration.

We have proposed a micron quartz fiber doped with metal particles and experimentally studied its spectral characteristics. The corresponding simulated spectra meet very well the experimental results. In this configuration, the silver spheres with the diameters of 300–500 nm are fixed in the quartz fiber and embraced by two air cavities. We measured the transmission spectra by micro-manipulating the signal and probe fiber taper simultaneously. The resonance wavelength transformed from 1544 nm to 1557 nm when we moved the probe fiber taper along the micron fiber. The simulated calculation indicates that the spectra characteristics depend on the geometry parameters of the fiber configuration.