[23p-C105-1~11] 12.3 Functional Materials and Novel Devices

△ [23p-C105-7] Effect of incident beam wavelength on nonlinear molecular reorientation in oligothiophene-doped liquid crystals

〇Tomohiro Kitano¹, Junki Yokota¹, Kohsuke Matsumoto^1,2, Miho Aizawa^1,3, Kyohei Hisano¹, Shoichi Kubo¹, Rumiko Yamaguchi⁴, Atsushi Shishido¹ (1.Lab. for Chem. & Life Sci., Tokyo Tech, 2.IMS, 3.PRESTO, JST, 4.Akita Univ.)

Keywords:Liquid crystal, Nonlinear optical effect, Molecular reorientation

Liquid crystals (LCs) exhibit excellent ability of nonlinear optical effects due to their molecular reorientation induced by an incident laser beam. We have reported that the irradiation of oligothiophene-doped LCs enables their molecular reorientation at a very low light intensity. However, the mechanism of the photoresponsive behavior of the dye-doped LCs has not been revealed yet. In this study, we focused on the wavelength dependence of optical absorption of the dye molecules and evaluated the effect of the wavelength of the incident laser beam on their nonlinear optical response by using the laser beams with a wavelength of 445 nm and 488 nm.