Linear and Nonlinear Optical Properties of Orcein Dye
Wasan K. Hasan, Jassim T. Mahdi and Ammar S. Hameed
This paper reports investigation of linear and nonlinear optical properties optical properties of the orcein dye embedded in Polystyrene (PS) and Polyvinyl Chloride (PVC) matrices. From spectroscopic measurements its linear optical parameters were derived. Another modern and highly sensitive method, known as Z-scan, was implemented to obtain the nonlinear optical parameters. The open aperture measurements permitted to demonstrate the presence of two photon absorption in the studied dye. The closed aperture Z-scan exhibit a top to bottom shape transmission, characteristic of a negative material nonlinear index of refraction.
Keywords: Orcein Dye, Dye doped polymer films, Polymer blend, z-scan, nonlinear index of refraction, nonlinear optics, two photon absorption