Q&A with Prosper Allo

What project are you working on?

I am developing monolithic silicon light sources based on atomic-scale defect centers, designed to operate at cryogenic temperatures. These devices will generate single photons and entangled photon pairs directly on commercial silicon photonic chips, enabling scalable integration into both classical optical interconnects and quantum communication systems.

What problem(s) are you aiming to address through your research?

While silicon is the backbone of modern electronics and computing, it has a fundamental limitation: it does not efficiently emit light. This century-old challenge has prevented the integration of light sources directly on silicon chips, forcing reliance on costly, non-scalable materials. My research addresses this by engineering defect-based silicon emitters that can act as practical, scalable light sources. Solving this problem will enable low-cost platforms for classical optical links and for quantum networks.

What inspired you to pursue this program of study?

I am deeply motivated by the challenge of building technologies once thought impossible. My background across physics, electronics, and computing has shown me how interdisciplinary approaches can unlock new possibilities. The idea of turning silicon—the same material that transformed classical computing—into the foundation for the quantum internet is both scientifically exciting and socially impactful. Through this program, I hope to strengthen my expertise, grow as a research leader, and contribute to Canada’s role in shaping the future of global communications.