Nanoparticle based photonic devices

In this talk I will describe the fabrication and the optical characterization of multilayer photonic structures. The multilayer structures have been fabricated starting from colloidal dispersions of metal oxide nanoparticles and by employing spin-coating technique. We have mostly used nanoparticles of silicon dioxide, titanium dioxide and indium tin oxide. We have obtained in this way porous multilayer structures. 

I will then show the exploitation of such multilayer structures in different device architectures. By placing the photonic structures between two electrodes, we could observe electric field driven tuning. By adding a thin layer of silver on top of the photonic structures we could obtain a colorimetric sensors for bacterial contaminants.