In the present invention, a photosensitive layer of an optical recording medium includes a photo-responsive high-molecular compound comprising a photo-responsive group (e.g., an azobenzene derivative) which is geometrically isomerized by light radiation, and a liquid crystal linear mesogen group (e.g., a biphenyl derivative), wherein the photo-responsive group and the linear mesogen group are respectively bonded as side chains. The invention provides an optical recording medium enabling large scale recording by making the photosensitive layer thick without impairing recording characteristics. The photo-responsive high-molecular compound preferably comprises an aromatic ring on a main chain. Further, the photo-responsive high-molecular compound preferably comprises a structural unit which is capable of forming a liquid-crystalline or crystalline polymer and a structural unit which is capable of forming an amorphous polymer.
在本发明中,光学记录介质的感光层包括一种光响应高分子化合物,其中包括一个光响应基团(例如,
偶氮苯衍
生物),该基团可以通过光辐射几何异构化,以及一种液晶线性介质基团(例如,
联苯衍
生物),其中光响应基团和线性介质基团分别作为侧链结合。该发明提供了一种光学记录介质,使感光层变厚而不影响记录特性,从而实现大规模记录。光响应高分子化合物最好包括一个主链上的芳香环。此外,光响应高分子化合物最好包括一种能够形成液晶或结晶聚合物的结构单元和一种能够形成非晶聚合物的结构单元。