[17a-M_B104-1~11] 12.3 Functional Materials and Novel Devices

9:30 AM - 9:45 AM JST(12:30 AM - 12:45 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[17a-M_B104-3] Light-driven Control of Twisted Bipolar Microparticles by Polarized Optical Tweezers

〇(M2)Makoto Okumura¹, Soh Kushida¹, Ken-ichi Yuyama², Yohei Yamamoto¹ (1.Univ. of Tsukuba, 2.Osaka Metro Univ.)

Keywords:

polymer microsphere,optical tweezers,spin angular momentum

Rotational control of microparticles using optical tweezers with circularly polarized light has attracted considerable attention in recent years. In this study, we fabricated microparticles with a twisted bipolar alignment exhibiting an anisotropic cholesteric helical structure and investigated their motion under illumination with different polarization states. Rotational motion dependent on the helical chirality was induced only under illumination containing a left-handed circularly polarized component. In particular, under elliptically polarized light, a periodic modulation of the rotational speed was observed. These results demonstrate that the response of the dielectric axis, originating from anisotropic molecular orientation, to the optical electric field contributes to the rotational motion.