Since 1988 his research interests have been focused on several theoretical and experimental aspects of Electronic, Optoelectronic and Photonic Technologies. He has published contributions in modeling, design, simulation and fabrication of integrated optical devices and circuits for optical signal processing, telecommunications and sensing applications, by considering a number of materials and technologies, mainly ferroelectric (lithium niobate) and semiconductors (silicon and various group IV compounds, III-V alloy compounds). He has been also involved in studies on dry etching mechanisms, proton exchange technologies, nonlinear effects in silicon and semiconductor lasers. Currently, he is mainly involved in Group IV Photonics (silicon-on-insulator, silicon compounds, germanium) and fiber optic sensors.