[19p-C43-1~15] 4.7 Quantum Optics, Nonlinear Optics and Structured Optics

14:15 〜 14:30英語発表

[19p-C43-4] High-speed atomic force microscopy combined with optical vortex for in-situ real-time observation of twisting azo-polymer

〇Kota Kojimoto¹, Rihito Tamura², Chan Feng-Yueh³, Keishi Yang¹, Takayuki Uchihashi^3,4, Prabhat Verma¹, Takashige Omatsu^2,5, Takayuki Umakoshi¹ (1.Osaka Univ., 2.Chiba Univ., 3.Nagoya Univ., 4.ExCELLS, Nagoya Univ., 5.MCRC, Chiba Univ.)

キーワード：

HS-AFM、Optical vortex、Azo-polymer

An azo-polymer film is a photoactive material forming unique surface reliefs through photoisomerization reactions under light irradiation, which is promising for various optical applications such as optical memory. Moreover, by irradiating the azo-polymer film with optical vortex, a complex twisting structure was formed due to the orbital angular momentum of optical vortex. However, the deformation dynamics and mechanisms have not been fully elucidated. Recently, we demonstrated that high-speed atomic force microscopy (HS-AFM) is capable of capturing azo-polymer motions in real-time at the nanoscale. Although a simple linear polarization of incident light was used in this study, HS-AFM will be a powerful tool to study more complex dynamics, such as azo-polymer twisting under optical vortex. Therefore, in this study, we constructed HS-AFM combined with optical vortex, as illustrated in Fig. 1, to observe the deformation process of azo-polymer induced by optical vortex.