Fig. 4: Optical phase-change memory device and its respective principle of operation. | Light: Science & Applications

Fig. 4: Optical phase-change memory device and its respective principle of operation.

From: Optical RAM and integrated optical memories: a survey

Fig. 4

a Information is stored in the phase state of the GST section on top of the nanophotonic waveguide. b Demonstration of binary memory operation between the crystalline (lower, level 0) and amorphous (upper, level 1) states of a 5 μm GST device for multiple repetitions of the same switching cycle. Figure reproduced with permission from ref. 52, © 2015 Nature Publishing Group

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