Disclosed herewith is a method for enabling fast and high density recording of information. A voltage is applied to a recording layer formed between a pair of electrodes. The distance between the pair of electrodes is set wider at one of land and groove areas of a subject optical disk and narrower at the other, or the disk has multi-recording layer structure and light absorption occurs only in the layer on which coloring voltage is applied. The optical disk is provided with a layer of which light absorption spectrum changes according to the application of voltage, thereby absorbing the light. The layer may be the recording layer itself or a layer adjacent to the recording layer. Because a heat generates only in a selected area of the optical disk at the time of recording, the disk can also avoid cross-talks between layers during reading and can be turned rapidly and permissively to the auto focusing and tracking offsets, thereby enabling fast and high density recording. The disk can thus be formed with easily selectable multiple layers.