Silver-containing light waveguides, formed by ion-exchange process in glasses containing alkali oxides, were annealed in hydrogen atmosphere at temperatures in the range 150-250 °C. The processing technique causes silver atom precipitation to form nanometer-size clusters with approximately 2-10 nm distribution in sizes and a spatial distribution. The composites were measured by transmission electron microscopy, optical spectroscopies, m-lines technique, Rutherford backscattering energies, elastic recoil detection analysis and secondary ion mass spectrometry. The nano-sized cluster formation, accompanied by silver and sodium interdiffusion processes, after hydrogen permeation in the matrix, is not simply ascribed to a direct interaction with hydrogen, but to a more complex process involving a charge balancing mechanism during ion transport phenomena. Such a process is discussed in terms of a phenomenological model. Nonlinear refractive indices of some samples were measured.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Condensed Matter Physics
- Materials Chemistry
Borsella, E., De Marchi, G., Caccavale, F., Gonella, F., Mattei, G., Mazzoldi, P., ... Miotello, A. (1999). Silver cluster formation in ion-exchanged waveguides: Processing technique and phenomenological model. Journal of Non-Crystalline Solids, 253(1-3), 261 - 267. https://doi.org/10.1016/S0022-3093(99)00358-0