My research has delved into the exciting field of light-emitting materials, with a particular focus on developing innovative solutions for silicon (Si)-based microphotonics and near-infrared light-emitting devices. A central theme in my work has been the incorporation of rare-earth elements, especially Erbium (Er), into various semiconductor host materials to achieve desired optical properties.
Specifically, I have explored the potential of Erbium-doped Si-rich Zinc Oxide (ZnO) for creating multiband near-infrared light emitters, pushing the boundaries of what’s possible for integrated optical devices. My investigations have also thoroughly examined Erbium-based materials for silicon microphotonics, addressing the critical need for efficient light sources that can be integrated directly onto silicon chips. A significant part of this work involved understanding the role of silicon excess on the excitation mechanisms of Erbium in silicon oxide (SiOx), providing crucial insights into how these materials interact at the atomic level to produce light. Furthermore, I have characterized the luminescence properties of Erbium implanted silicon nanoclusters, demonstrating their potential for highly localized light emission. This body of research collectively contributes to advancing the fundamental understanding and practical application of rare-earth doped semiconductors, paving the way for next-generation photonic integrated circuits and high-performance near-infrared devices.
These projects have been funded partly by University of Catania and performed during my PhD course, and by Boston University under a program supported by AFOSR – Air Force Office of Scientific Research Program.