Abstract
In the present work, Poly(3-hexylthiophene)/Polymethylmethacrylate [P3HT/PMMA] composite thin film was prepared using spin coating method on the top of triangular prism as composing a prism coupling waveguide. The optical bistable characteristics of prism coupling waveguide comprising with P3HT/PMMA composite film was measured for different input laser power intensity using optical bistable measuring equipment. Also the effect of organic gas treatment on the optical bistable behavior of P3HT/PMMA quasi-waveguide has been investigated. The measured optical bistabilities have excellent stability and hysteresis characteristics. In the input laser power dependence of optical bistability, the on-off position shifts with the increase of input laser power intensity. A Nd:YAG laser with a wavelength of 1064 nm, a pulse width of 5 ns and a repetition frequency of 10 Hz was used for this measurement.
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