Modeling of nano- and micro-spheres for sensing applications

The design of both active and passive micro/nano-sphere systems is performed by optimizing their sizes, spatial distribution and the other physical and geometrical parameters. In particular, rare earth doped spherical particles are designed in order to obtain distributed and highly efficient light sources for active sensors. The lasing characteristics of active silica glass microsphere are numerically simulated in the third band of optical fibre communication by means of a home made computer code. Finally, passive and active spherical nanoparticles, covered by a thin metallic shell, surrounded by different dielectric materials and arranged in different lattices are optimized for sensing applications.