Elucidation of mechanism of memory effect in photoswitching and development of new device

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Organic conductors, which are organic crystals having high electrical conductivity, show conductivity switching to highly conductive state in the presence of laser light and pulsed electric fields. The highly conductive state can persist after the cease of photoirradiation because of memory effect, of which the mechanism is studied through the experiments in a variety of conditions. Moreover, time-resolved measurement technique of property change induced by photoexcitation is applied to organic superconductor, and characteristic behaviors in photoresponse are observed.