| Abstract: | A new cyanine thin film has been prepared for high density digital versatile disc recordable (DVD R) by means of a spin coating process. The effects of the optical and thermal properties of the cyanine dye on recording characteristics have been studied. Rapid decomposition of the cyanine dye in a narrow temperature range, which is critical to the clear mark edges, is shown in this paper. A steep absorption edge at the 635 nm is crucial to high reflectivity. The optical recording performance of the cyanine dye thin film shows that high reflectivity contrast (48%) can be obtained at low writing power and narrow writing pulse width using He Ne laser (632.8 nm) irradiation. The carrier to noise ratio (CNR) of the single layer disk is greater than 40 dB at travelling rate of 2.4 m/s. |
