[11a-N307-1~9] 4.7 Quantum Optics and Nonlinear Optics

▲ [11a-N307-9] Formation of spiral surface relief with a Hermite-Gaussian beam

〇Arata Tomita¹, Adam Valles², Miyamoto Katsuhiko¹, Takashige Omatsu¹ (1.Chiba Univ., 2.Institut de Ciencies Fotoniques)

Keywords:laser materials processing, azopolymers, Hermite-Gaussian beam

Submicron-scale chiral structures have been attracting much attention in a myriad of fields, such as ultrahigh-density optical data storages with a freedom of chirality, chiral metamaterials and chiral plasmonics. To date, several researchers have discovered that an optical vortex with orbital angular momentum (OAM) twists azopolymers to form chiral surface reliefs, reflecting a helical wavefront of the irradiated optical vortex, with the help of spin angular momentum (SAM) associated with circular polarization. In this presentation, we here propose a new approach for light induced chiral surface reliefs, in which the chiral surface reliefs of azopolymers are formed by the irradiation of the temporally rotating Hermite-Gaussian (HG) beams without OAM.