Science & Technology New chip opens door to AI computing at light speed. A new silicon-photonic (SiPh) chip design?from the lab of Nader Engheta, alongside Firooz Aflatouni, uses light waves, the fastest possible means of communication, rather than electricity, to perform mathematical computations. . Penn engineers have developed a new chip that uses light waves, rather than electricity, to perform the complex math essential to training AI. The chip has the potential...