Optical Spectral Change in Conducting Polymer Due to Insulator-Metal Transition Induced by Light Irradiation and Proposal As Optical Memory Element

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Abstract
By the irradiation of light on the conducting polymer like polythiophene doped with diaryliodonium salts, its absorption spectrum changes remarkably, which can be explained in terms of an insulator-metal transition due to light induced doping. The application of this phenomenon as an optical memory element which can be written by the light irradiation, is proposed.