Optical and recording properties of copper phthalocyanine films

Vacuum-sublimed films of copper phthalocyanine (CuPc) were prepared. The absorption spectrum and optical constants of the film were studied. It was found that there is a comparatively large absorption region at wavelength of 550 - 750 nm. A static optical recording test on a CuPc film on a glass substrate indicated that low power HeNe laser irradiation could initiate a relatively large reflectivity change. It has been observed that the introduction of a metallic reflective layer on the recording layer will raise the writing threshold energy and the maximum reflectivity contrast.