A tiny switch could redirect light between computer chips in mere nanoseconds

Light waves can transport information more efficiently than electric current

gold plate

A new kind of tiny switch uses an ultrathin gold disk to catch light waves (blue pulses) traveling down one wirelike structure called a waveguide (flowing top right to bottom left), and transfers that light to a new waveguide. Many of these switches connected in an array could help a computer process information using light, rather than electric current.

S. Kelley/NIST

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