Optical memory for integrated all-optical logic

An optical processor comprising:

• an optical pulse generator;
• an optical memory comprising a plurality of memory cells, each memory cell comprising a phase-change material, the phase-change material having a first state and a second state;
• and
• optical logic,
• wherein:
• the optical pulse generator is configured to generate an optical interrogation pulse, the optical interrogation pulse being directed at the optical memory,
• the optical memory is configured to direct the optical interrogation pulse at one or more of the memory cells thereby generating one or more optical readout pulses, each optical readout pulse corresponding to the state of the phase-change material in the one or more memory cells, thereby encoding data stored in the one or more memory cells, each optical readout pulse being directed to the optical logic, and
• the optical logic is configured to, based on the one or more optical readout pulses, perform at least one logical operation on the data.