Abstract
Poly (3-hexylthiophene)/polymethylmethacrylate [P3HT/PMMA] composite thin film was prepared by the spin-coating method by composing a prism-coupled waveguide. The UV-visible spectrum was recorded in the range of 300-900nm to determine its optical absorption property. An Nd: YAG laser with a wavelength of 1064nm, a pulse width of 5ns, and a repetition frequency of 10Hz was used for optical bistability measurements. The optical bistable characteristics of the prism-coupled waveguide comprised of P3HT/PMMA composite thin film was measured for different input laser power intensity using optical bistable measuring equipment. The effect of organic gas treatment on the optical bistable behavior of the P3HT/PMMA quasi-waveguide was observed. The effect of PMMA molecular weight on the optical bistability of the P3HT/PMMA waveguide was also investigated.
