welcome to plessey

Engineering
the future in light

Technologies shaped by light.
We design and build three photonic technologies – integrated under one roof, engineered to work together.

microleds

Smaller, brighter, sharper, more efficient.

The visual interface for AR, MR and next-era wearables. Our MicroLED technology delivers unprecedented pixel density and energy efficiency. Designed for people, ready to scale.

optical computing

Processing with photons, not electrons.

Faster, cooler, far less energy. Optical computing enables AI and computation at unprecedented scale. Where silicon reaches its limits, light takes over.

Together, these three technologies form the hardware foundation for AR, AI and next-era computing.

Total process.
One operation.

Only Plessey combines research, IP, materials, processes and manufacturing in one integrated operation. By controlling every step – from source to signal – we shorten development cycles and strengthen every stage.

Deep know-how

70+ years of innovation. We’ve built our expertise through decades of research, development and manufacturing in photonics and semiconductor technologies.

Broad capability

Research to volume production. Our integrated facility enables rapid iteration from laboratory breakthrough to scaled manufacturing – without handoffs, delays or compromised specifications.

Single facility

Plymouth, UK – every stage connected. When research, process engineering and production occupy the same building, problems get solved faster and products reach market sooner.

Independent spirit. Serious intent.

We don’t follow familiar paths—we set new ones. Tested, proven, scaled.

When the world’s largest technology companies need breakthroughs in optical technologies, they come to us. Not noise, not hype – just capability, trusted and relied on.

Seventy years of invention – still moving forward.

Ready to discuss
your requirements?