| 摘要 |
An optical recording/reproducing method and an optical recording medium capable of performing excellent optical recording with a simple structure in a recording layer made of environmentally friendly materials. The optical recording medium (10) has a recording layer (18) on a substrate (12). The recording layer may have a pair of dielectric layers (16A,16B) containing cluster-like state-changing material, the optical characteristics such as reflectivity of which are altered by a laser beam by increasing the cluster size and changing the state from amorphous to crystalline. The recording layer also has a state-change assisting material which may be a layer (14) sandwiched by these dielectric layers. The state-change assisting layer includes an element selected from Sn,Ti,Si,Bi,Ge, and C as a principle component, which the dielectric material is at least one of ZnS, SiO2, AlN, and Ta2O5. The recording layer may also be a mixture of the dielectric material and the state-change assisting material. <IMAGE>
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