| 摘要 |
An optical modulation member having a memory function to which information is to be written by using an optical signal is disposed between two transparent electrodes opposed to each other. A photoconductive member includes an amorphous silicon type photoconductive layer disposed adjacent to the optical modulation member, and a thin film disposed between the photoconductive layer and one of the two transparent electrode and made of a material having a band gap of not less than 3 eV.
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