随着信息科学的迅速发展,对存储介质的存储密度和存储容量的要求在不断提高,然而传统的信息存储方法已几乎接近物理极限,于是寻找新的存储介质和存储方法就成为近年来信息科学的研究热点。光存储技术是继磁存储技术之后的又一新兴技术,它利用光改变物质物理或者化学性质存储信 With the rapid development of information science, the requirements for the storage density and storage capacity of storage media are increasing. However, the traditional storage methods for information have almost reached the physical limits. Therefore, searching for new storage media and storage methods has become a hot issue in information science Research hot spots. Optical storage technology is another emerging technology after magnetic storage technology, which uses light to change the physical or chemical properties of the material storage letter