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Operating principle of KIT's all-optical on-chip memory device.
Operating principle of KIT's all-optical on-chip memory device. Information is stored in the phase state of the GST section on top of the nanophotonic waveguide. Ultra-short light pulses switch the GST material from crystalline to amorphous and back. Weak light pulses read out the data. (Photo: C. Rios/Oxford University).
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