OPTICAL AND RECORDING PROPERTIES OF COPPER PHTHALOCYANINE FILMS

Vacuum-sublimed films of copper phthalocyanine (CuPc) were prepared. T he 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 f ilm on a glass substrate indicated that low power He-Ne laser irradiat ion 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 maximu m reflectivity contrast.