ABSTRACT
The optical properties of poly-methyl methacrylate (PMMA) films with difference filling levels of black carbon (BC) were studied in the visible and ultraviolent wavelength regions. It was found that the optical absorption is due to allowed- and, forbidden- direct transitions and the energy gaps decrease with increasing BC content for all transitions, while the width of the tail localized states increase with increasing BC content. The optical constants refractive index , extinction coefficient , the real and imaginary parts of the dielectric constant have been also calculated. The dielectric constant increased in the composite samples as compared with the pure PMMA sample prepared by the same method.
