
Researchers from Oxford University, the University of Münster, the Karlsruhe Institute of Technology and the University of Exeter have created the world’s first all-photonic nonvolatile memory chip.
A paper published this week in the journal Nature Photonics describes how intense pulses of light sent through a waveguide can change the state of Ge2Sb2Te5 (GST) material — the same as that used in rewritable CDs and DVDs. The pulse of light causes...