In this illustration, light is coupled into a nanoscale cavity and interacts with an atomically thin material, creating exciton-polaritons. These hybrid particles combine light’s speed with matter’s ability to interact, enabling optical signal switching. Credit: Zhi Wang Eighty years after the creation of ENIAC, the world's first general-purpose electronic computer, researchers at the University of Pennsylvania are exploring a new way to power the future of computing. Instead of relying