[11a-C310-1~12] 3.1 Basic optics and frontier of optics

11:45 AM - 12:00 PM JST(2:45 AM - 3:00 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[11a-C310-11] Optical Force Measurements on Triangular Gold Nanoparticles Using Light-Driven Micromachines

〇(M2)Hiroki Yokota¹, Shun Hashiyada^1,2, Ryuichi Ohta^1,2, Yoshito Tanaka¹ (1.RIES, Hokkaido Univ., 2.JST-PRESTO)

Keywords:

Optical Force,Optical Tweezers

Gold nanorod pairs of different lengths exhibit strong directional lateral light scattering perpendicular to the incident light vector, driven by localized surface plasmon resonance. The resulting in-plane optical force arising from the scattering recoil has been applied to nanoactuators. In contrast, triangular gold nanoparticles can produce similar unidirectional lateral scattering even as a single particle; furthermore, owing to their threefold rotational symmetry, they exhibit strong directional scattering in three distinct directions depending on the polarization angle of the incident linearly polarized light. In this study, toward the development of novel light-driven nanoactuators, the in-plane optical force characteristics acting on these nanoparticles were quantitatively analyzed through both numerical simulations and experiments.