Callum Littlejohns

Professor Callum Littlejohns is a Professorial Fellow-Enterprise at the University of Southampton, specializing in silicon photonics and integrated optical systems. He is affiliated with the Photonic Systems, Circuits and Sensors Group, focusing on advancing high-speed photonic devices and energy-efficient optical interconnects.

• Research interests: silicon photonics, optical engineering, wavelength conversion, and photonic education.
• Active projects: Horizon Europe - DOLORES, PIXEurope; EPSRC-funded Layered Materials Research Foundry.
• Collaborations: with Professors Graham Reed, David Thomson, and Anna Peacock on silicon photonic modulators and switches.

His recent publications emphasize 3D integration, MOSCAP ring modulators, and Kerr effect-based high-speed devices. He also contributes to workforce development through photonics education programs.