[26a-E205-1~9] 3.2 Equipment optics and materials

△ [26a-E205-8] Effect of wavelength of the incident laser beam on photo-induced molecular reorientation of oligothiophene-doped liquid crystals

〇Tomohiro Kitano¹, Junki Yokota¹, Kohsuke Matsumoto¹, Shoichi Kubo¹, Atsushi Shishido¹ (1.Lab. for Chem. & Life Sci., Tokyo Tech)

Keywords:Liquid crystal, Nonlinear optical effect, Molecular reorientation

Liquid crystals (LCs) exhibit excellence ability in nonlinear optical effects due to their controllability of molecular reorientation. We have previously reported that the irradiation of the oligothiophene-doped LCs can induce their molecular reorientation at a very low light intensity. However, the phenomena were investigated only for the incident light with a wavelength of 488 nm. Molecular reorientation behavior by irradiation with another wavelength provides a new insight for photonic applications. In this study, we evaluated the photoresponsive behavior of the dye-doped LCs by the incident laser beam at a wavelength of 445 nm, giving a higher optical absorption of the dye.