| 摘要 |
An optical recording medium has a mask layer of a non-linear optical material and a phase change recording layer, and an intermediate dielectric layer disposed therebetween wherein an optical aperture is formed in the mask layer upon exposure to a reading light beam. A recording light beam is irradiated to the recording layer from the side away from the mask layer, and a reading light beam is irradiated to the recording layer from the mask layer side. Microscopic recorded marks below the diffraction limit are readable. |
