講演情報
[9p-A23-3]Using a C-point defect of optical skyrmions for laser nanofabrication
〇Soki Hirayama1,2, Takashige Omatsu1,3 (1.Serendip Research Lab., 2.Chiba Univ., 3.NYCU)
キーワード：
optical skyrmion、structured light、nanofabrication
Optical skyrmions, formed of the coherent superposition of the fundamental Gaussian and Laguerre–Gaussian (LG) modes with orthogonal circular polarizations, possess a unique polarization texture with a circular polarization defect (C-point defect) in the beam cross-section. To date, we and co-workers have demonstrated that optical skyrmions can ‘twist’ a photosensitive azo-polymer film around the C-point defect to form sub-wavelength scale topological surface reliefs. In this study, we further discuss the super-resolution C-point defect of optical skyrmions for laser nanofabrication. The power ratio between LG and fundamental Gaussian modes was controlled properly by adjusting a polarization angle of the beam incident on the spatial light modulator (SLM). It is worth mentioning that increasing the mode mixing power ratio enables the shrinkage of a C-point defect spot. The minimum dimensions of the fabricated surface relief will be then determined by balancing the diameter and optical intensity of the C-point defect spot.