[23p-A310-1~5] 4.7 Quantum Optics, Nonlinear Optics and Structured Optics

13:30 〜 13:45英語発表

[23p-A310-2] Femtosecond optical vortex-induced flower-shaped surface relief in azo-polymer

〇Kana Ishihara¹, Katsuhiko Miyamoto^2,1, Takashige Omatsu^2,1 (1.Chiba Univ, 2.MCRC, Chiba Univ)

キーワード：

azopolymer、flower-shaped surface relief、optical vortex

We study two photon absorption (TPA) induced surface relief formation in azopolymers by illumination of femtosecond near-infrared optical vortex. We discover, for the first time, the optical vortex creates an unexpected flower-shaped surface relief with 4~8 petals along the azimuthal direction. This surface relief clears the modulation instability associated with the third-order nonlinear optical effect in azopolymers.