The object
Haas pioneered Li-Fi, hardware that modulates LED light sources to transmit data through optical wireless links. The approach turns illumination equipment into communications infrastructure and offers a distinct spectrum and security profile from conventional radio Wi-Fi.
01
What Harald did
Pioneered Li-Fi systems that use LED luminaires as high-speed wireless optical transmitters.
02
Why it matters
The University of Edinburgh identifies Haas as the inventor of Li-Fi and documents its transition from laboratory demonstration to commercial optical-wireless products.
03
Living-status check
The University of Edinburgh's 2026 academic profile lists Haas as professor and Li-Fi R&D Centre director.