170. Optically controlled light propagation in dye-doped nematic liquid crystals with homogeneous alignment, T. Sasaki, K. Miura, H. Ono and O. Hanaizumi, Key Eng. Mater. 497 (2012) 142-146.


Light propagation in an optical waveguide fabricated by employing a dye-doped liquid crystal (DDLC) was observed. The propagation of a light signal in the waveguide was varied by irradiation with a control light whose wavelength was in the absorption band of the DDLC. By considering the photothermal effect of the DDLC, which enables the change of the refractive index due to temperature variation based on the absorption of light, we qualitatively explained the observed light propagation and demonstrated manipulation of the propagation.

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