Optical Bistable Characteristics of Optical Quasi-waveguide Prepared with Host-Guest Thin Film

The host-guest thin film using nonlinear optical material was fabricated by the spin coat method on the bottom face of a right-angled prism dropped down the solution of tershari-Butyl Vanadyl-phthalocyanine ((t-Bu)nVOPc) and PMMA. To improve the nonlinear optical characteristics, the host-guest thin film was treated with organic gas. Optical bistable characteristics were evaluated by using the optical quasi-waveguide prepared with host-guest thin film after and before organic gas treatment. After and before organic gas treatment, optical bistable characteristics were observed by changing the incident angles of laser beam to prism. Optical bistable characteristics after organic gas treatment were compared with before treatment. After treatment, optical bistable behavior is more sensitive than that before treatment. Moreover, the organic gas treating time dependences of optical bistability were investigated by using the measuring equipment of optical bistability.