| http://www.w3.org/ns/prov#value | - FIG. 11 is a graph showing the complementary drive waveforms when switching between recording and reproducing in the fourth embodiment of the present invention (FIG. 11A is a graph showing the temporal change of the currents injected into an active layer region and a phase adjustment region and FIG. 11B is a graph showing the change of the refractive indexes of the active layer region over time an
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